Properties of the Number 72451

Seventy-Two Thousand Four Hundred Fifty-One

Basics

Value: 72450 → 72451 → 72452

Parity: odd

Prime: No

Previous Prime: 72431

Next Prime: 72461

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 53 × 1367

Divisors: 1, 53, 1367, 72451

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001101100000011

Octal: 215403

Duodecimal: 35B17

Hexadecimal: 11b03

Square: 5249147401

Square Root: 269.1672342615275

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

Iccanobirt numbers (14 of 15): a(n) = R(R(a(n-1)) + R(a(n-2)) + a(n-3)), where R is the digit reversal function A004086. A102124

Iccanobirt semiprimes (14 of 15): Semiprime numbers in A102124. A102204

Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101. A260469

Number of odd terms in the reduced residue system of 2·n-1. A72451

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101. A260475

Expansion of e.g.f.: exp(x³/3 + x²/2). A55814