Properties of the Number 72161

Seventy-Two Thousand One Hundred Sixty-One

Basics

Value: 72160 → 72161 → 72162

Parity: odd

Prime: Yes

Previous Prime: 72139

Next Prime: 72167

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 72161

Divisors: 1, 72161

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100111100001

Octal: 214741

Duodecimal: 35915

Hexadecimal: 119e1

Square: 5207209921

Square Root: 268.6279955626368

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

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d = 2, 4 or 6) and forming d-pattern=[6,2,4]; short d-string notation of pattern = [624]. A78853

Denominator of ∑_k=1..n φ(k)/k⁴. A72161

Least hypotenuse, c, of a Primitive Pythagorean Triangle (PPT) such that the difference between it, c, and its greater leg, b, is n; or 0 if no such PPT exists. A277534