156081121 has 8 divisors (see below), whose sum is σ = 182019200. Its totient is φ = 133783524.

The previous prime is 156081113. The next prime is 156081157. The reversal of 156081121 is 121180651.

It is a happy number.

It is not a de Polignac number, because 156081121 - 2³ = 156081113 is a prime.

It is a super-2 number, since 2×156081121² = 48722632665233282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156081521) 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, 227181 + ... + 227866.

It is an arithmetic number, because the mean of its divisors is an integer number (22752400).

Almost surely, 2^156081121 is an apocalyptic number.

It is an amenable number.

156081121 is a deficient number, since it is larger than the sum of its proper divisors (25938079).

156081121 is an frugal number, since it uses more digits than its factorization.

156081121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455068 (or 455054 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 156081121 is about 12493.2430137255. The cubic root of 156081121 is about 538.4145552083.

The spelling of 156081121 in words is "one hundred fifty-six million, eighty-one thousand, one hundred twenty-one".