Properties of the Number 81105

Eighty-One Thousand One Hundred Five

Basics

Value: 81104 → 81105 → 81106

Parity: odd

Prime: No

Previous Prime: 81101

Next Prime: 81119

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 5407

Divisors: 1, 3, 5, 15, 5407, 16221, 27035, 81105

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011010001

Octal: 236321

Duodecimal: 3AB29

Hexadecimal: 13cd1

Square: 6578021025

Square Root: 284.78939587000076

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

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. A299740

Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. A299735

Number of n X 6 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. A299738

5th binomial transform of (1,1,0,0,0,0,.....). A81105