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70,000

From Wikipedia, the free encyclopedia
← 69999 70000 70001 →
Cardinalseventy thousand
Ordinal70000th
(seventy thousandth)
Factorization24× 54× 7
Greek numeral
Roman numeralLXX
Binary100010001011100002
Ternary101200001213
Senary13000246
Octal2105608
Duodecimal3461412
Hexadecimal1117016

70,000(seventy thousand) is thenatural numberthat comes after69,999and before 70,001. It is a round number.

Selected numbers in the range 70001–79999[edit]

70001 to 70999[edit]

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

71000 to 71999[edit]

  • 71656= pentagonal pyramidal number

72000 to 72999[edit]

73000 to 73999[edit]

74000 to 74999[edit]

  • 74088= 423= 23* 33* 73
  • 74353= Friedman prime
  • 74897= Friedman prime

75000 to 75999[edit]

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

76000 to 76999[edit]

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

77000 to 77999[edit]

  • 77777= repdigit
  • 77778= Kaprekar number[9]

78000 to 78999[edit]

79000 to 79999[edit]

  • 79507= 433

Primes[edit]

There are 902 prime numbers between 70000 and 80000.

References[edit]

  1. ^Sloane, N. J. A.(ed.)."Sequence A007304 (Sphenic numbers: products of 3 distinct primes)".TheOn-Line Encyclopedia of Integer Sequences.OEIS Foundation.
  2. ^Sloane, N. J. A.(ed.)."Sequence A000217 (Triangular numbers: a(n) = binomial(n+1,2) = n*(n+1)/2 = 0 + 1 + 2 +... + n)".TheOn-Line Encyclopedia of Integer Sequences.OEIS Foundation.
  3. ^Sloane, N. J. A.(ed.)."Sequence A000384 (Hexagonal numbers: a(n) = n*(2*n-1))".TheOn-Line Encyclopedia of Integer Sequences.OEIS Foundation.
  4. ^"Sloane's A000045: Fibonacci numbers".The On-Line Encyclopedia of Integer Sequences.OEIS Foundation.Retrieved2016-06-16.
  5. ^"Sloane's A002559: Markoff (or Markov) numbers".The On-Line Encyclopedia of Integer Sequences.OEIS Foundation.Retrieved2016-06-16.
  6. ^Sloane, N. J. A.(ed.)."Sequence A000041 (a(n) is the number of partitions of n (the partition numbers).)".TheOn-Line Encyclopedia of Integer Sequences.OEIS Foundation.
  7. ^"Sloane's A002997: Carmichael numbers".The On-Line Encyclopedia of Integer Sequences.OEIS Foundation.Retrieved2016-06-16.
  8. ^"Sloane's A000078: Tetranacci numbers".The On-Line Encyclopedia of Integer Sequences.OEIS Foundation.Retrieved2016-06-16.
  9. ^"Sloane's A006886: Kaprekar numbers".The On-Line Encyclopedia of Integer Sequences.OEIS Foundation.Retrieved2016-06-16.