Properties of the Number 75139

Seventy-Five Thousand One Hundred Thirty-Nine

Basics

Value: 75138 → 75139 → 75140

Parity: odd

Prime: No

Previous Prime: 75133

Next Prime: 75149

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 29 × 2591

Divisors: 1, 29, 2591, 75139

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010010110000011

Octal: 222603

Duodecimal: 37597

Hexadecimal: 12583

Square: 5645869321

Square Root: 274.1149393958673

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

Zsigmondy numbers for a = 7, b = 5: Zs(n, 7, 5) is the greatest divisor of 7ⁿ - 5ⁿ that is relatively prime to 7^m - 5^m for all positive integers m < n. A109349

a(n) = 2·a(n-1) + 35·a(n-2), a(0) = 0, a(1) = 1. A80920

Structured octagonal anti-prism numbers. A100184

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01010-11111 pattern in any orientation. A147066

Square array T(n,k) read by antidiagonals up. Cumulative column sums of A177975. A177976

Numerator of the generalized harmonic number H(n,5,2). A75139