Properties of the Number 15886

Fifteen Thousand Eight Hundred Eighty-Six

Basics

Value: 15885 → 15886 → 15887

Parity: even

Prime: No

Previous Prime: 15881

Next Prime: 15887

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 13 ² × 47

Divisors: 1, 2, 13, 26, 47, 94, 169, 338, 611, 1222

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11111000001110

Octal: 37016

Duodecimal: 923A

Hexadecimal: 3e0e

Square: 252364996

Square Root: 126.03967629282455

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

Numbers of Twopins positions. A5683

Numbers k such that (k, σ(k)) lies on a circle with integral radius centered at the origin, i.e., k² + σ(k)² is a square. A66764

Numbers k such that σ(k) = ψ(k) + τ(k)². A390296

Number of incongruent ways to tile a 5 X 2n room with 1x2 Tatami mats. At most 3 Tatami mats may meet at a point. A68930

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 246", based on the 5-celled von Neumann neighborhood. A280331

a(n) = 8·n² - 7·n + 1. A125201

Number of partitions of n into parts of exactly four sorts which are introduced in ascending order such that sorts of adjacent parts are different. A320546

Nonsquarefree numbers k such that A003415(k) divides A276086(k), where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function. A371085

a(n) = ∑_{k=0..floor(n/6)} (-1)^k * (7·k+1) * binomial(2·n-5·k+1,n-6·k)/(2·n-5·k+1). A390477

a(0) = 1, a(n) = 11·n² + 2 for n>0. A10003