Properties of the Number 72106

Seventy-Two Thousand One Hundred Six

Basics

Value: 72105 → 72106 → 72107

Parity: even

Prime: No

Previous Prime: 72103

Next Prime: 72109

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 31 × 1163

Divisors: 1, 2, 31, 62, 1163, 2326, 36053, 72106

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001100110101010

Octal: 214652

Duodecimal: 3588A

Hexadecimal: 119aa

Square: 5199275236

Square Root: 268.52560399336227

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

Icosahedral numbers: a(n) = n*(5·n² - 5·n + 2)/2. A6564

Number of partitions of n such that (greatest part) + (least part) > number of parts. A237871

Numbers k such that k-3, k-5, k-17, k-257, and k-65537 are all primes. A63825

The number of nontotients (even and odd) in the reduced residue system of n. A72106

a(n) = ∑_k=0..n C(n,k)* [x^n-k] A(x)^k for n>0, with a(0)=1. A125222