Properties of the Number 81154

Eighty-One Thousand One Hundred Fifty-Four

Basics

Value: 81153 → 81154 → 81155

Parity: even

Prime: No

Previous Prime: 81131

Next Prime: 81157

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 40577

Divisors: 1, 2, 40577, 81154

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110100000010

Octal: 236402

Duodecimal: 3AB6A

Hexadecimal: 13d02

Square: 6585971716

Square Root: 284.8754113643366

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

E.g.f.: 2 - exp(2) + ∑_n>=1 2ⁿ * exp(xⁿ) / n!. A258899

Number of odd cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with no fixed points of either A057163 or A057164. A81154

Number of 4Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1s. A297752