Properties of the Number 57861

Fifty-Seven Thousand Eight Hundred Sixty-One

Basics

Value: 57860 → 57861 → 57862

Parity: odd

Prime: No

Previous Prime: 57859

Next Prime: 57881

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 2143

Divisors: 1, 3, 9, 27, 2143, 6429, 19287, 57861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110001000000101

Octal: 161005

Duodecimal: 29599

Hexadecimal: e205

Square: 3347895321

Square Root: 240.54313542481316

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

a(n) = (1/n²) * ∑_d∣n moebius(n/d)*binomial(3·d,d). A268617

Number of ordered trees with n edges such that non-leaf vertices at even (odd) level have an odd (even) number of children. A248096

E.g.f. A(x) satisfies: [xⁿ] A(x)^3·n = (n + 2) * [x^n-1] A(x)^3·n for n>=1. A300986

floor[2ⁿ/Fibonacci(n)]. A57861