Properties of the Number 12939

Twelve Thousand Nine Hundred Thirty-Nine

Basics

Value: 12938 → 12939 → 12940

Parity: odd

Prime: No

Previous Prime: 12923

Next Prime: 12941

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 19 × 227

Divisors: 1, 3, 19, 57, 227, 681, 4313, 12939

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001010001011

Octal: 31213

Duodecimal: 75A3

Hexadecimal: 328b

Square: 167417721

Square Root: 113.74972527439353

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of 3·n binary matrices without unit columns up to row and column permutations. A57524

Minimal elements of pairs of "Super Unitary Amicable Numbers", sorted by their minimal elements. A45613

Bihappy numbers: numbers that reach 1 under iteration of the sum-of-squares-of-two-digits map s₂. A257795

Write down the numbers from 3 to infinity. Take next number, M say, that has not been crossed off. Counting through the numbers that have not yet been crossed off after that M, cross off every 5th term. Repeat, always crossing off every 5th term of those that remain. The numbers that are left form the sequence. A100586

Product of n-th prime and the sum of the divisors of n. A272211

Partial sums of A018805. A177853

a(n) = n * (11·n² + 6·n + 1) / 6. A215646

Number of standard Young tableaux with n cells and 8 as last value in the first row. A245006

a(n) is the number of squares of side length greater than 1 having vertices at the points of an n X n grid of dots. A328152

a(n) is the start of the least run of exactly n consecutive positive integers with the same value of A071626, or -1 if no such run exists. A357386