157356421 has 8 divisors (see below), whose sum is σ = 158497664. Its totient is φ = 156219840.

The previous prime is 157356389. The next prime is 157356427. The reversal of 157356421 is 124653751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157356421 - 2⁵ = 157356389 is a prime.

It is a super-2 number, since 2×157356421² = 49522086459858482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157356427) 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, 90466 + ... + 92188.

It is an arithmetic number, because the mean of its divisors is an integer number (19812208).

Almost surely, 2^157356421 is an apocalyptic number.

It is an amenable number.

157356421 is a deficient number, since it is larger than the sum of its proper divisors (1141243).

157356421 is a wasteful number, since it uses less digits than its factorization.

157356421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331.

The product of its digits is 25200, while the sum is 34.

The square root of 157356421 is about 12544.1787694532. The cubic root of 157356421 is about 539.8769964466.

The spelling of 157356421 in words is "one hundred fifty-seven million, three hundred fifty-six thousand, four hundred twenty-one".