Properties of the Number 71681

Seventy-One Thousand Six Hundred Eighty-One

Basics

Value: 71680 → 71681 → 71682

Parity: odd

Prime: No

Previous Prime: 71671

Next Prime: 71693

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 43 × 1667

Divisors: 1, 43, 1667, 71681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100000000001

Octal: 214001

Duodecimal: 35595

Hexadecimal: 11801

Square: 5138165761

Square Root: 267.73307602909284

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 partitions of n containing a prime number of primes and an arbitrary number of nonprimes. A344677

a(n) = ∑_k=1..n (-1)^k+1 * floor((n/k)³). A350222

a(n) = 70·n² + 1. A158734

Number of independent vertex sets in the n-Andrásfai graph. A288038

Number of ways to represent the n-th prime as arithmetic mean of two other primes. A71681