157404321 has 12 divisors (see below), whose sum is σ = 227512272. Its totient is φ = 104866776.

The previous prime is 157404311. The next prime is 157404337. The reversal of 157404321 is 123404751.

It is not a de Polignac number, because 157404321 - 2⁷ = 157404193 is a prime.

It is a super-2 number, since 2×157404321² = 49552240538942082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157404311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11190 + ... + 20976.

It is an arithmetic number, because the mean of its divisors is an integer number (18959356).

Almost surely, 2^157404321 is an apocalyptic number.

It is an amenable number.

157404321 is a deficient number, since it is larger than the sum of its proper divisors (70107951).

157404321 is a wasteful number, since it uses less digits than its factorization.

157404321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11580 (or 11577 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 157404321 is about 12546.0878763063. The cubic root of 157404321 is about 539.9317712151.

The spelling of 157404321 in words is "one hundred fifty-seven million, four hundred four thousand, three hundred twenty-one".