Properties of the Number 12918

Twelve Thousand Nine Hundred Eighteen

Basics

Value: 12917 → 12918 → 12919

Parity: even

Prime: No

Previous Prime: 12917

Next Prime: 12919

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 2153

Divisors: 1, 2, 3, 6, 2153, 4306, 6459, 12918

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001001110110

Octal: 31166

Duodecimal: 7586

Hexadecimal: 3276

Square: 166874724

Square Root: 113.65737987477979

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 integer compositions of n whose leaders of weakly decreasing runs are themselves weakly decreasing. A374747

Numbers that are the sum of nine fourth powers in nine or more ways. A345593

Numbers that are the sum of nine fourth powers in exactly nine ways. A345851

a(1) = 932; for n > 1, a(n) = a(n-1) + 1 + sum of distinct prime factors of a(n-1) that are < a(n-1). A105213

Number of ternary strings of length n which contain 01. A186314

Harmonic Molien series for Conway group Con.0. A8924

The number of degree sequences with degree sum 2n representable by a non-separable graph (with multiple edges allowed). A147877

Numbers that are divisible by exactly 3 primes (counted with multiplicity) and sandwiched between primes. A171179

Triangle read by rows: T(n,k) = is the number of directed column-convex polyominoes of area n having along the lower contour exactly k reentrant corners, i.e., a vertical step that is followed by a horizontal step (n >= 1, k >= 0). A121466

Admirable numbers in the middle of twin primes. A135502