Properties of the Number 72143

Seventy-Two Thousand One Hundred Forty-Three

Basics

Value: 72142 → 72143 → 72144

Parity: odd

Prime: No

Previous Prime: 72139

Next Prime: 72161

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 19 × 3797

Divisors: 1, 19, 3797, 72143

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001100111001111

Octal: 214717

Duodecimal: 358BB

Hexadecimal: 119cf

Square: 5204612449

Square Root: 268.5944898913602

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

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A316423

a(n) = A159065(n+1) - A334701(n). A335677

Numbers n such that 22 applications of 'Reverse and Subtract' lead to n, whereas fewer than 22 applications do not lead to n. A72143

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A316427