Properties of the Number 64145

Sixty-Four Thousand One Hundred Forty-Five

Basics

Value: 64144 → 64145 → 64146

Parity: odd

Prime: No

Previous Prime: 64123

Next Prime: 64151

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 12829

Divisors: 1, 5, 12829, 64145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111101010010001

Octal: 175221

Duodecimal: 31155

Hexadecimal: fa91

Square: 4114581025

Square Root: 253.26863208853953

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) = 1 + 2·n + 2²*n*[n/2] + 2³*n*[n/2]*[n/3] + 2⁴*n*[n/2]*[n/3]*[n/4] + ... where [x]=floor(x). A208060

Number of (w,x,y,z) with all terms in {1,...,n} and w·x>y·z+1. A212054

a(n) = τ(n!-1) or number of divisors of n!-1. A64145