181140 has 24 divisors (see below), whose sum is σ = 507360. Its totient is φ = 48288.

The previous prime is 181123. The next prime is 181141. The reversal of 181140 is 41181.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181141) by changing a digit.

181140 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1450 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (21140).

2¹⁸¹¹⁴⁰ is an apocalyptic number.

181140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181140 is an abundant number, since it is smaller than the sum of its proper divisors (326220).

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

181140 is a wasteful number, since it uses less digits than its factorization.

181140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 181140 is about 425.6054510929. The cubic root of 181140 is about 56.5811088715.

The spelling of 181140 in words is "one hundred eighty-one thousand, one hundred forty".