Properties of the Number 71724

Seventy-One Thousand Seven Hundred Twenty-Four

Basics

Value: 71723 → 71724 → 71725

Parity: even

Prime: No

Previous Prime: 71719

Next Prime: 71741

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 43 × 139

Divisors: 1, 2, 3, 4, 6, 12, 43, 86, 129, 139

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100000101100

Octal: 214054

Duodecimal: 35610

Hexadecimal: 1182c

Square: 5144332176

Square Root: 267.81336785156935

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 nX2 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A317735

Number of upward triangles in a Star of David matchstick arrangement of size n. A45950

a(n) = 3·binomial(2n, n-1)/(n+2), n > 0, with a(0)=1. A71724