156927921 has 16 divisors (see below), whose sum is σ = 216319488. Its totient is φ = 101088000.

The previous prime is 156927917. The next prime is 156927943. The reversal of 156927921 is 129729651.

156927921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156927921 - 2² = 156927917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156922921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119971 + ... + 121271.

It is an arithmetic number, because the mean of its divisors is an integer number (13519968).

Almost surely, 2^156927921 is an apocalyptic number.

It is an amenable number.

156927921 is a deficient number, since it is larger than the sum of its proper divisors (59391567).

156927921 is a wasteful number, since it uses less digits than its factorization.

156927921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632.

The product of its digits is 68040, while the sum is 42.

The square root of 156927921 is about 12527.0874907139. The cubic root of 156927921 is about 539.3865014799.

The spelling of 156927921 in words is "one hundred fifty-six million, nine hundred twenty-seven thousand, nine hundred twenty-one".