181158 has 16 divisors (see below), whose sum is σ = 366960. Its totient is φ = 59616.

The previous prime is 181157. The next prime is 181183. The reversal of 181158 is 851181.

181158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181157) 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, 516 + ... + 792.

It is an arithmetic number, because the mean of its divisors is an integer number (22935).

2¹⁸¹¹⁵⁸ is an apocalyptic number.

181158 is an abundant number, since it is smaller than the sum of its proper divisors (185802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181158 is a wasteful number, since it uses less digits than its factorization.

181158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

The product of its digits is 320, while the sum is 24.

The square root of 181158 is about 425.6265969133. The cubic root of 181158 is about 56.5829829767.

It can be divided in two parts, 18 and 1158, that added together give a triangular number (1176 = T₄₈).

The spelling of 181158 in words is "one hundred eighty-one thousand, one hundred fifty-eight".