Properties of the Number 80721

Eighty Thousand Seven Hundred Twenty-One

Basics

Value: 80720 → 80721 → 80722

Parity: odd

Prime: No

Previous Prime: 80713

Next Prime: 80737

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 8969

Divisors: 1, 3, 9, 8969, 26907, 80721

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011101101010001

Octal: 235521

Duodecimal: 3A869

Hexadecimal: 13b51

Square: 6515879841

Square Root: 284.1144135731237

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 unlabeled connected planar graphs with n edges with degree >= 3 at each node. A338594

Triangle of binomial(n,k)*(binomial(n+k,k)-binomial(n+k-2,k-1)). A80721