157421157 has 8 divisors (see below), whose sum is σ = 209966880. Its totient is φ = 104911440.

The previous prime is 157421149. The next prime is 157421171. The reversal of 157421157 is 751124751.

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

It is not a de Polignac number, because 157421157 - 2³ = 157421149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157421197) 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, 3807 + ... + 18147.

It is an arithmetic number, because the mean of its divisors is an integer number (26245860).

Almost surely, 2^157421157 is an apocalyptic number.

It is an amenable number.

157421157 is a deficient number, since it is larger than the sum of its proper divisors (52545723).

157421157 is a wasteful number, since it uses less digits than its factorization.

157421157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18003.

The product of its digits is 9800, while the sum is 33.

The square root of 157421157 is about 12546.7588244933. The cubic root of 157421157 is about 539.9510209349.

The spelling of 157421157 in words is "one hundred fifty-seven million, four hundred twenty-one thousand, one hundred fifty-seven".