Properties of the Number 12986

Twelve Thousand Nine Hundred Eighty-Six

Basics

Value: 12985 → 12986 → 12987

Parity: even

Prime: No

Previous Prime: 12983

Next Prime: 13001

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 43 × 151

Divisors: 1, 2, 43, 86, 151, 302, 6493, 12986

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001010111010

Octal: 31272

Duodecimal: 7622

Hexadecimal: 32ba

Square: 168636196

Square Root: 113.95613191048562

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

Cubes written backwards. A4165

Number of base 24 n-digit numbers with adjacent digits differing by two or less. A126411

Number of 1-sided strip polycairos with n cells. A151535

Solution to the Dancing School Problem with 4 girls and n+4 boys: f(4,n). A79909

Imbalance of the number of parts of all partitions of n. A194796

a(n) = 7·n² + n. A92277

Number of (w,x,y,z) with all terms in {1,...,n} and w+x<=2y+2z. A212563

Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to a heptagonal number H(m) for some m. A251927

Expansion of a q-series used by Ramanujan in his Lost Notebook. A279715

E.g.f. A(x) satisfies A(x) = exp(x + x⁴/24·A'''(x)). A386532