Properties of the Number -181439

One Hundred Eighty-One Thousand Four Hundred Thirty-Nine

Basics

Value: -181440 → -181439 → -181438

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 181439

Divisors: 1, 181439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -101100010010111111

Octal: -542277

Duodecimal: -88BBB

Hexadecimal: -2c4bf

Square: 32920110721

Square Root: 425.9565705562012

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

a(n) = n!/2 - 1. A139172

a(n) is the number of numbers removed in each step of Eratosthenes's sieve for 9!. A145536

Primes which produce records in A157188, at index i=π(a(n)) (π=A000720). A157190

The least prime p such that equation x = p·sopf(x) (where sopf(x) is the sum of distinct prime factors of x) has exactly n solutions in positive integers. A336296

a(n) is the smallest prime such that exactly n prime pairs (p,q) exist with a(n) = p·q + p + q. A198277

Primes of the form k! / 2 - 1. A290116

Largest prime of the form n!/k!-1. A93622

Primes of the form 7n² - 8. A201853

Numbers k such that 441·2^k+1 is prime. A323149

a(n) is the least prime p such that there are exactly n pairs of primes (q,r) with p > q > r such that q | r + p and r | q + p. A344776