Properties of the Number 72147

Seventy-Two Thousand One Hundred Forty-Seven

Basics

Value: 72146 → 72147 → 72148

Parity: odd

Prime: No

Previous Prime: 72139

Next Prime: 72161

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 24049

Divisors: 1, 3, 24049, 72147

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001100111010011

Octal: 214723

Duodecimal: 35903

Hexadecimal: 119d3

Square: 5205189609

Square Root: 268.6019359572823

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

24 'Reverse and Add' steps are needed to reach a palindrome. A65318

a(n) is the numerator of the probability that the procedure described in A372422 successfully ends with the selection of a single person, starting with n persons. A372482

Records for the length of the preperiodic part of the 'Reverse and Subtract' trajectories. A72147

Number of (n+1)X(4+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111. A259423