Properties of the Number 81975

Eighty-One Thousand Nine Hundred Seventy-Five

Basics

Value: 81974 → 81975 → 81976

Parity: odd

Prime: No

Previous Prime: 81973

Next Prime: 82003

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ² × 1093

Divisors: 1, 3, 5, 15, 25, 75, 1093, 3279, 5465, 16395

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000000110111

Octal: 240067

Duodecimal: 3B533

Hexadecimal: 14037

Square: 6719900625

Square Root: 286.31276604440814

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

Floor[X/Y] where X = concatenation of (n+1)-st odd number through the 2n-th odd number and Y = concatenation of first n odd numbers. A67093

Number of reducible Boolean polynomials of degree n with constant term 1. A169914

a(n) = ∑_{i=1..floor((n+1)/4)} a(2·i-1) * a(n-2·i+1), with a(1)=3 and a(2)=a(3)=1. A24737

Number of (5+2) X (n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252724

Triangular number pertaining to A081974. a(n) = A081974(n)*A081974(n+1). A81975