Properties of the Number 11665

Eleven Thousand Six Hundred Sixty-Five

Basics

Value: 11664 → 11665 → 11666

Parity: odd

Prime: No

Previous Prime: 11657

Next Prime: 11677

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 2333

Divisors: 1, 5, 2333, 11665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110110010001

Octal: 26621

Duodecimal: 6901

Hexadecimal: 2d91

Square: 136072225

Square Root: 108.00462953040486

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

G.f.: 1/G(0) where G(k) = 1 + (-q)^k+1 / (1 - (-q)^k+1/G(k+1) ). A227310

Pierpont semiprimes: semiprimes of the form (2^K)*(3^L)+1. A113432

Values of the genus g for which there exists a compact Riemann surface of genus g admitting an automorphism group of order 84(g-1), the maximum possible, also known as the Hurwitz bound. A179982

Number of semi-lone-child-avoiding rooted trees with at most one distinct non-leaf branch directly under any vertex. A331933

a(n) = 2·n³ + 1. A33562

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime. A251819

Numbers k such that k⁸ == 1 (mod 9³). A56084

Coefficient of x^-n in expansion of continued fraction 0, x, x², x³, x⁴, ... . A49346

a(n) = 9·n² + 1. A247792

a(n) = 36·n² + 1. A158591