118491 has 8 divisors (see below), whose sum is σ = 159744. Its totient is φ = 78120.

The previous prime is 118471. The next prime is 118493. The reversal of 118491 is 194811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118491 - 2⁹ = 117979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 536.

It is an arithmetic number, because the mean of its divisors is an integer number (19968).

2¹¹⁸⁴⁹¹ is an apocalyptic number.

118491 is a deficient number, since it is larger than the sum of its proper divisors (41253).

118491 is a wasteful number, since it uses less digits than its factorization.

118491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its digits is 288, while the sum is 24.

The square root of 118491 is about 344.2252169728. The cubic root of 118491 is about 49.1166179718.

It can be divided in two parts, 1184 and 91, that added together give a triangular number (1275 = T₅₀).

The spelling of 118491 in words is "one hundred eighteen thousand, four hundred ninety-one".