Properties of the Number 25861

Twenty-Five Thousand Eight Hundred Sixty-One

Basics

Value: 25860 → 25861 → 25862

Parity: odd

Prime: No

Previous Prime: 25849

Next Prime: 25867

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 11 × 2351

Divisors: 1, 11, 2351, 25861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010100000101

Octal: 62405

Duodecimal: 12B71

Hexadecimal: 6505

Square: 668791321

Square Root: 160.81355664246718

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 positive integers <= 10ⁿ that are divisible by no prime exceeding 7. A106600

Sum over all permutations of [n] of the length of the longest increasing subsequence raised to the power of the length of the longest decreasing subsequence. A321276

Expansion of 1/(1-x+x²-2·x³). A77951

Expansion of 1/(1+x+x²+2·x³). A77976

a(n) = ∑_k<=n A007955(k) * A000027(k) = ∑_k<=n A007955(k) * k, where A007955(m) = product of divisors of m. A174935

Expansion of 1/((1-x⁴)*(1-x⁵)*(1-x⁹)). A25861