Properties of the Number 81124

Eighty-One Thousand One Hundred Twenty-Four

Basics

Value: 81123 → 81124 → 81125

Parity: even

Prime: No

Previous Prime: 81119

Next Prime: 81131

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 17 × 1193

Divisors: 1, 2, 4, 17, 34, 68, 1193, 2386, 4772, 20281

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011100100

Octal: 236344

Duodecimal: 3AB44

Hexadecimal: 13ce4

Square: 6581103376

Square Root: 284.82275190019493

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

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(0) + b(1) + ... + b(n-1), where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences. A295053

Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and determinant >= 3n. A211153

a(n) = 54·n² - 26·n + 4 (n>=1). A304381

Upper Beatty array of sqrt(2). A182638

Number of 5-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions. A187860

T(n,k)=Number of n-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on a kXk board summed over all starting positions. A187857

Binomial transform of floor(n/2)!. A81124