60,000

60,000 (sixty thousand) is the natural number that comes after 59,999 and before 60,001. It is a round number. It is the value of ${\displaystyle \varphi }$(F₂₅).^[1]

← 59999 60000 60001 →
List of numbers Integers ← 0 10k 20k 30k 40k 50k 60k 70k 80k 90k →
Cardinal	sixty thousand
Ordinal	60000th (sixty thousandth)
Factorization	2^5 × 3 × 5^4
Greek numeral	${\displaystyle {\stackrel {\digamma }{\mathrm {M} }}}$
Roman numeral	LX
Binary	11101010011000002
Ternary	100010220203
Senary	11414406
Octal	1651408
Duodecimal	2A88012
Hexadecimal	EA6016

Selected numbers in the range 60,000–69,999

60,001 to 60,999

• 60,049 = Leyland number^[2]
• 60,101 = smallest prime with period of reciprocal 100^[3]

61,000 to 61,999

62,000 to 62,999

• 62,208 = 3-smooth number
• 62,210 = Markov number^[4]
• 62,745 = Carmichael number^[5]

63,000 to 63,999

• 63,020 = amicable number with 76084
• 63,360 = inches in a mile
• 63,600 = number of free 12-ominoes
• 63,750 = pentagonal pyramidal number
• 63,973 = Carmichael number^[5]

64,000 to 64,999

• 64,000 = 40³
• 64,009 = sum of the cubes of the first 22 positive integers
• 64,079 = Lucas number
• 64,442 = Number of integer degree intersections on Earth: 360 longitudes * 179 latitudes + 2 poles = 64442.

65,000 to 65,999

• 65,025 = 255², palindromic in base 11 (44944₁₁)
• 65,535 = largest value for an unsigned 16-bit integer on a computer.
• 65,536 = 2¹⁶, also 2↑↑4 using Knuth's up-arrow notation, smallest integer with exactly 17 divisors, palindromic in base 15 (14641₁₅), number of directed graphs on 4 labeled nodes^[6]
• 65,537 = largest known Fermat prime
• 65,539 = the 6544th prime number, and both 6544 and 65539 have digital root of 1; a regular prime; a larger member of a twin prime pair; a smaller member of a cousin prime pair; a happy prime; a weak prime; a middle member of a prime triplet, (65537, 65539, 65543); a middle member of a three-term primes in arithmetic progression, (65521, 65539, 65557).
• 65,792 = Leyland number^[2]

66,000 to 66,999

• 66,012 = tribonacci number^[7]
• 66,049 = 257², palindromic in hexadecimal (10201₁₆)
• 66,198 = Giuga number^[8]
• 66,666 = repdigit

67,000 to 67,999

• 67,081 = 259², palindromic in base 6 (1234321₆)
• 67,171 = 1⁶ + 2⁶ + 3⁶ + 4⁶ + 5⁶ + 6^6[9]
• 67,607 = largest of five remaining Seventeen or Bust numbers in the Sierpiński problem
• 67,626 = pentagonal pyramidal number

68,000 to 68,999

• 68,921 = 41³

69,000 to 69,999

• 69,632 = Leyland number^[2]
• 69,696 = square of 264; only known palindromic square that can be expressed as the sum of a pair of twin primes: 69,696 = 34847 + 34849.
• 69,984 = 3-smooth number

References

1. Sloane, N. J. A. (ed.). "Sequence A065449". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. "Sloane's A076980 : Leyland numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
3. "Sequence A007138". Online Encyclopedia of Integer Sequences.
4. "Sloane's A002559 : Markoff (or Markov) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
5. "Sloane's A002997 : Carmichael numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
6. Sloane, N. J. A. (ed.). "Sequence A002416". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
7. "Sloane's A000073 : Tribonacci numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
8. "Sloane's A007850 : Giuga numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
9. Sloane, N. J. A. (ed.). "Sequence A031971". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.