Properties of the Number 71145

Seventy-One Thousand One Hundred Forty-Five

Basics

Value: 71144 → 71145 → 71146

Parity: odd

Prime: No

Previous Prime: 71143

Next Prime: 71147

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 17 × 31

Divisors: 1, 3, 5, 9, 15, 17, 27, 31, 45, 51

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001010111101001

Octal: 212751

Duodecimal: 35209

Hexadecimal: 115e9

Square: 5061611025

Square Root: 266.7302007647428

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

Amicable numbers. A63990

Larger of amicable pair. A2046

Amicable pairs. A259180

Numbers k such that σ(k) = 4*φ(k). A68390

Larger member of an infinitary amicable pair. A126170

Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x. A259933

Larger of bi-unitary amicable pair. A292981

Odd amicable numbers. A262625

Larger of tri-unitary amicable numbers pair: numbers (m, n) such that tsigma(m) = tsigma(n) = m + n, where tsigma(n) is the sum of the tri-unitary divisors of n (A324706). A324709

Larger of amicable pair (x, y) as they are listed in A259933. A260087