157674321 has 12 divisors (see below), whose sum is σ = 260287872. Its totient is φ = 90099576.

The previous prime is 157674289. The next prime is 157674323. The reversal of 157674321 is 123476751.

It is a happy number.

It is not a de Polignac number, because 157674321 - 2⁵ = 157674289 is a prime.

It is a super-2 number, since 2×157674321² = 49722383005622082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157674323) 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, 1251321 + ... + 1251446.

It is an arithmetic number, because the mean of its divisors is an integer number (21690656).

Almost surely, 2^157674321 is an apocalyptic number.

It is an amenable number.

157674321 is a deficient number, since it is larger than the sum of its proper divisors (102613551).

157674321 is a wasteful number, since it uses less digits than its factorization.

157674321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502780 (or 2502777 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 157674321 is about 12556.8435922408. The cubic root of 157674321 is about 540.2403148481.

The spelling of 157674321 in words is "one hundred fifty-seven million, six hundred seventy-four thousand, three hundred twenty-one".