Properties of the Number 81476

Eighty-One Thousand Four Hundred Seventy-Six

Basics

Value: 81475 → 81476 → 81477

Parity: even

Prime: No

Previous Prime: 81463

Next Prime: 81509

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 20369

Divisors: 1, 2, 4, 20369, 40738, 81476

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111001000100

Octal: 237104

Duodecimal: 3B198

Hexadecimal: 13e44

Square: 6638338576

Square Root: 285.4400112107621

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 different strings of length n+6 obtained from "123...n" by iteratively duplicating any substring. A137739

Number of nX5 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A302677

Number of n X n binary matrices M with rows in strictly increasing order such that M² (mod 2) has rows in strictly decreasing order. A181263

Consider the mapping f(x/y) = (x+y)/(2xy) where x/y is a reduced fraction. Beginning with x₀ = 1 and y₀ = 2, repeated application of this mapping produces a sequence of fractions x_n/y_n; a(n) is the n-th denominator. A81476