Properties of the Number 15906

Fifteen Thousand Nine Hundred Six

Basics

Value: 15905 → 15906 → 15907

Parity: even

Prime: No

Previous Prime: 15901

Next Prime: 15907

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 11 × 241

Divisors: 1, 2, 3, 6, 11, 22, 33, 66, 241, 482

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111000100010

Octal: 37042

Duodecimal: 9256

Hexadecimal: 3e22

Square: 253000836

Square Root: 126.11899143269423

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 Hamiltonian cycles in C₄ X P_n. A3699

Sum of numbers that can be written as t·n + u*(n+1) for nonnegative integers t,u in exactly one way. A76454

Numbers which are the sum of their proper divisors containing the digit 5. A59464

Series reversion of x*(1-3·x²)/(1-x²) in odd-order powers. A235347

Array read by antidiagonals: T(n,k) is the number of Hamiltonian cycles in the stacked prism graph P_n X C_k, n >= 1, k >= 2. A359855

Expansion of (1+4·x+x²)/((1+x)²*(1-x)⁵). A233329

Composite numbers k such that σ(k)*(φ(k) + 2) is a square. A65655

Number of partitions of n into 6 or more distinct parts. A347573

Numbers k such that φ(k) + 2 | σ(k + 2). A15781

Series reversion of x*(1+3·x²)/(1+x²) in odd-power terms. A235352