Properties of the Number 81126

Eighty-One Thousand One Hundred Twenty-Six

Basics

Value: 81125 → 81126 → 81127

Parity: even

Prime: No

Previous Prime: 81119

Next Prime: 81131

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 4507

Divisors: 1, 2, 3, 6, 9, 18, 4507, 9014, 13521, 27042

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011100110

Octal: 236346

Duodecimal: 3AB46

Hexadecimal: 13ce6

Square: 6581427876

Square Root: 284.8262628340301

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

Smallest number k such that kⁿ is the sum of numbers in a twin prime pair. A195336

Number of n-digit 9th powers. A216659

Number of n X 5 arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..1 n X 5 array. A220029

Hyper-Wiener index of rows of unit cells on the face-centered cubic lattice. A302256

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, 0, 0), (0, -1, 1), (0, 1, 1), (1, 0, -1)}. A148940

Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 2,2 polyhexes in any orientation on a planar nXnXn triangular grid. A155221

Duplicate of A018191. A81126