Properties of the Number 81452

Eighty-One Thousand Four Hundred Fifty-Two

Basics

Value: 81451 → 81452 → 81453

Parity: even

Prime: No

Previous Prime: 81439

Next Prime: 81457

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 7 × 2909

Divisors: 1, 2, 4, 7, 14, 28, 2909, 5818, 11636, 20363

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111000101100

Octal: 237054

Duodecimal: 3B178

Hexadecimal: 13e2c

Square: 6634428304

Square Root: 285.39796775730554

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 k > 1 such that, in base 7, k and k² contain the same digits in the same proportion. A61661

Total runs-resistance of all binary vectors of length n. A319415

The number of reachable states in a simple two-player counting game, in which each player starts with the pair (1,1) and one move is to add one of the opponent's numbers to one of your own numbers, but no number can grow above a pre-defined maximum n. The game continues until one of the players has no legal moves left. The winner is the one having the higher sum of his numbers. A161531

Sum of binomial numbers A000332(k+3), with k in the reduced residue system modulo n. A192000

Partial maxima of A081448. A81452