Properties of the Number 81590

Eighty-One Thousand Five Hundred Ninety

Basics

Value: 81589 → 81590 → 81591

Parity: even

Prime: No

Previous Prime: 81569

Next Prime: 81611

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 41 × 199

Divisors: 1, 2, 5, 10, 41, 82, 199, 205, 398, 410

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111010110110

Octal: 237266

Duodecimal: 3B272

Hexadecimal: 13eb6

Square: 6656928100

Square Root: 285.63963310437157

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) = numerator of constant λ(n) involved in a recurrence for the Atkin polynomials A_k(j). A145226

Number of n X 5 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1's. A295202

T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s. A295205

Fourth row of Pascal-(1,5,1) array A081580. A81590