Properties of the Number 15965

Fifteen Thousand Nine Hundred Sixty-Five

Basics

Value: 15964 → 15965 → 15966

Parity: odd

Prime: No

Previous Prime: 15959

Next Prime: 15971

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 5 × 31 × 103

Divisors: 1, 5, 31, 103, 155, 515, 3193, 15965

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111001011101

Octal: 37135

Duodecimal: 92A5

Hexadecimal: 3e5d

Square: 254881225

Square Root: 126.35268101627285

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 parts in all compositions of n into distinct parts. A97910

Perimeter s/6 (divided by 6) of primitive Pythagorean triangles such that perimeters are Averages of twin prime pairs, q=p+1, a=q²-p², c=q²+p², b=2·p*q, s=a+b+c, s-+1 are primes. A155176

a(n) = 10ⁿ mod 7ⁿ. A139737

Second pentagonal numbers that are interprime. A205881

Numbers n such that p(n) is congruent to n mod σ(n), where p(n) denotes the n-th prime. A66688

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 0, 0), (0, 1, 0), (1, -1, 0)}. A148117

Numbers k such that k | 14^k + 1. A15965

Array read by antidiagonals: Costs E[m,N] of m-ary Huffman trees of maximum height with N internal nodes (non-leaves) for minimizing absolutely ordered sequences of size n=2N+1; m > 1, N > 0. A98810