Properties of the Number 25982

Twenty-Five Thousand Nine Hundred Eighty-Two

Basics

Value: 25981 → 25982 → 25983

Parity: even

Prime: No

Previous Prime: 25981

Next Prime: 25997

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 11 × 1181

Divisors: 1, 2, 11, 22, 1181, 2362, 12991, 25982

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010101111110

Octal: 62576

Duodecimal: 13052

Hexadecimal: 657e

Square: 675064324

Square Root: 161.18932967166282

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

Triangle T(n,k) = binomial(n,k) + A176490(n,k) - 1 read along rows 0<=k<=n. A176491

p-INVERT of the positive integers, where p(S) = 1 - S - S² - S³ + S⁴. A291032

Triangle T(n,k) read by rows: T(n,k) = (n-k+1)*T(n-1,k-1) + (3·k-2)*k·T(n-1,k), initialized by T(n,1) = T(n,n) = 1. A166972

a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026681. A26690

Number of partitions of n into parts not of the form 21k, 21k+8 or 21k-8. Also number of partitions with at most 7 parts of size 1 and differences between parts at distance 9 are greater than 1. A35986

Numbers k such that the sum of all possible subsequences of the digits in k, excluding k itself, is k. A65794

Expansion of 1/((1-2x)(1-4x)(1-9x)(1-12x)). A25982