Properties of the Number 81242

Eighty-One Thousand Two Hundred Forty-Two

Basics

Value: 81241 → 81242 → 81243

Parity: even

Prime: No

Previous Prime: 81239

Next Prime: 81281

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 7 ² × 829

Divisors: 1, 2, 7, 14, 49, 98, 829, 1658, 5803, 11606

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110101011010

Octal: 236532

Duodecimal: 3B022

Hexadecimal: 13d5a

Square: 6600262564

Square Root: 285.02982300103264

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

a(n) is the number of canonical polygons with 4n edges having 4-fold rotational symmetry. A307426

Left-to-right binary enumeration. A81242