Properties of the Number 71912

Seventy-One Thousand Nine Hundred Twelve

Basics

Value: 71911 → 71912 → 71913

Parity: even

Prime: No

Previous Prime: 71909

Next Prime: 71917

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 89 × 101

Divisors: 1, 2, 4, 8, 89, 101, 178, 202, 356, 404

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100011101000

Octal: 214350

Duodecimal: 35748

Hexadecimal: 118e8

Square: 5171335744

Square Root: 268.16412884649577

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

Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among quadruples. A15653

a(0) = 0, a(1) = 1; to get a(n+1) for n >= 1, let m = a(n) and consider in turn the numbers k = m-1, m-2, ..., 2, 1, m+1, m+2, m+3, ... until reach a k such that gcd(m,k) = 1 and m/k is different from all a(i)/a(i+1) for i = 0, ..., n-1. A71912

G.f. A(x) satisfies: 0 = [x^n-1] (x·A(x))' / (1 + x·A(x)ⁿ⁺¹)ⁿ for n>1. A303559