157397457 has 24 divisors (see below), whose sum is σ = 244778976. Its totient is φ = 89701248.

The previous prime is 157397453. The next prime is 157397459. The reversal of 157397457 is 754793751.

It is not a de Polignac number, because 157397457 - 2² = 157397453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157397453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63913 + ... + 66329.

It is an arithmetic number, because the mean of its divisors is an integer number (10199124).

Almost surely, 2^157397457 is an apocalyptic number.

It is an amenable number.

157397457 is a deficient number, since it is larger than the sum of its proper divisors (87381519).

157397457 is a wasteful number, since it uses less digits than its factorization.

157397457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877 (or 2870 counting only the distinct ones).

The product of its digits is 926100, while the sum is 48.

The square root of 157397457 is about 12545.8143219163. The cubic root of 157397457 is about 539.9239227530.

The spelling of 157397457 in words is "one hundred fifty-seven million, three hundred ninety-seven thousand, four hundred fifty-seven".