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161 (number)

October 21, 2023

161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162.

Cardinalone hundred sixty-one
Ordinal161st
(one hundred sixty-first)
Factorization7 × 23
Divisors1, 7, 23, 161
Greek numeralΡΞΑ´
Roman numeralCLXI
Binary101000012
Ternary122223
Senary4256
Octal2418
Duodecimal11512
HexadecimalA116

In mathematics Edit

  • 161 is the sum of five consecutive prime numbers: 23, 29, 31, 37, and 41
  • 161 is a hexagonal pyramidal number.[1]
  • 161 is a semiprime. Since its prime factors 7 and 23 are both Gaussian primes, 161 is a Blum integer.
  • 161 is a palindromic number[2]
  • 161/72 is a commonly used rational approximation of the square root of 5 and is the closest fraction with denominator <300 to that number.

In the military Edit

In music Edit

In transportation Edit

In other fields Edit

161 is also:

See also Edit

External links Edit

 
Wikimedia Commons has media related to 161 (number).

References Edit

  1. ^ "Sloane's A002412 : Hexagonal pyramidal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
  2. ^ "A002113 - Oeis".
  3. ^ . Czech Republic: Antifascist Action. 2012. Archived from the original (Documentary) on 3 January 2018. Retrieved 2 January 2018.

October 21, 2023
number, hundred, sixty, natural, number, following, preceding, list, numbersintegers, cardinalone, hundred, sixty, oneordinal161st, hundred, sixty, first, factorization7, 23divisors1, 161greek, numeralΡΞΑ, roman, numeralclxibinary101000012ternary122223senary42. 161 one hundred and sixty one is the natural number following 160 and preceding 162 160 161 162 160 161 162 163 164 165 166 167 168 169 List of numbersIntegers 0 100 200 300 400 500 600 700 800 900 Cardinalone hundred sixty oneOrdinal161st one hundred sixty first Factorization7 23Divisors1 7 23 161Greek numeralR3A Roman numeralCLXIBinary101000012Ternary122223Senary4256Octal2418Duodecimal11512HexadecimalA116 Contents 1 In mathematics 2 In the military 3 In music 4 In transportation 5 In other fields 6 See also 7 External links 8 ReferencesIn mathematics Edit161 is the sum of five consecutive prime numbers 23 29 31 37 and 41 161 is a hexagonal pyramidal number 1 161 is a semiprime Since its prime factors 7 and 23 are both Gaussian primes 161 is a Blum integer 161 is a palindromic number 2 161 72 is a commonly used rational approximation of the square root of 5 and is the closest fraction with denominator lt 300 to that number In the military EditUSNS Lone Jack T AO 161 was a U S Navy Type T2 tanker during World War II USS Barber DE 161 was a U S Navy Buckley class destroyer escort during World War II USS Barite IX 161 was a U S Navy Trefoil class concrete barge during World War II USS Beaverhead AK 161 was a U S Navy Alamosa class cargo ship during World War II USS Climax AM 161 was a U S Navy Admirable class minesweeper during World War II USS Dickens APA 161 was a U S Navy Haskell class attack transport during World War II USS Narada SP 161 was a U S Navy wooden yacht during World War I USS Palmer DD 161 was a U S Navy Wickes class destroyer during World War II USS Salinan ATF 161 was a U S Navy Achomawi class fleet ocean tug following World War II USS S 50 SS 161 was a U S Navy fourth group S class submarine between 1920 and 1931 USS Stingray SS 161 is a fictional U S Navy diesel engine submarine featured in the 1996 film Down Periscope The 161st Intelligence Squadron unit of the Kansas Air National Guard Its parent unit is the 184th Intelligence WingIn music EditThe Bose 161 Speaker System 2001 The Kay K 161 ThinTwin guitarIn transportation EditMTA Maryland commuter bus 161 New Jersey Bus Route 161 London Bus route 161In other fields Edit161 is also The year AD 161 or 161 BC 161 AH is a year in the Islamic calendar that corresponds to 777 778 CE 161 Athor is an M type Main belt asteroid E 161 is an ITU T assigns letters to the 12 key telephone keypad Fiorina Fury 161 is a foundry facility and penal colony from the film Alien 3 161 is used by Anti Fascist Action as a code for AFA A 1 F 6 by order of the alphabet sometimes used in 161 gt 88 3 88 is code for Heil Hitler among neo nazis as H 8 See also EditAnti Fascist Action List of highways numbered 161 United Nations Security Council Resolution 161 United States Supreme Court cases Volume 161External links Edit nbsp Wikimedia Commons has media related to 161 number Number Facts and Trivia 161 The Number 161 VirtueScience 161 Archived 2021 01 24 at the Wayback MachineReferences Edit Sloane s A002412 Hexagonal pyramidal numbers The On Line Encyclopedia of Integer Sequences OEIS Foundation Retrieved 2016 05 28 A002113 Oeis 161 gt 88 Czech Republic Antifascist Action 2012 Archived from the original Documentary on 3 January 2018 Retrieved 2 January 2018 Retrieved from https en wikipedia org w index php title 161 number amp oldid 1158601624, wikipedia, wiki, book, books, library,

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