← 69999 70000 70001 →
List of numbers Integers ← 0 10k 20k 30k 40k 50k 60k 70k 80k 90k →
Cardinal	seventy thousand
Ordinal	70000th (seventy thousandth)
Factorization	24 × 54 × 7
Greek numeral	${\displaystyle {\stackrel {\zeta }{\mathrm {M} }}}$
Roman numeral	LXX, lxx
Binary	100010001011100002
Ternary	101200001213
Senary	13000246
Octal	2105608
Duodecimal	3461412
Hexadecimal	1117016

70,000 (seventy thousand) is the natural number that comes after 69,999 and before 70,001. It is a round number.

Selected numbers in the range 70001–79999

• 70030 = largest number of digits of π that have been recited from memory

• 71656 = pentagonal pyramidal number

• 72771 = 3 x 127 x 191, is a sphenic number,^[1] triangular number,^[2] and hexagonal number.^[3]

• 73296 = is the smallest number n, for which n−3, n−2, n−1, n+1, n+2, n+3 are all Sphenic number.
• 73440 = 15 × 16 × 17 × 18 (can also be written as 18! ÷ 14! or ⁠18!/14!⁠)
• 73712 = number of n-Queens Problem solutions for n = 13
• 73728 = 3-smooth number

• 74353 = Friedman prime
• 74897 = Friedman prime

• 75025 = Fibonacci number,^[4] Markov number^[5]
• 75175 = number of partitions of 44 ^[6]
• 75361 = Carmichael number^[7]

• 76084 = amicable number with 63020
• 76424 = tetranacci number^[8]

• 77778 = Kaprekar number^[9]

• 78163 = Friedman prime
• 78498 = the number of primes under 1,000,000
• 78557 = conjectured to be the smallest Sierpiński number
• 78732 = 3-smooth number

References