157934257 has 4 divisors (see below), whose sum is σ = 170083060. Its totient is φ = 145785456.

The previous prime is 157934239. The next prime is 157934281. The reversal of 157934257 is 752439751.

157934257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752439751 = 7 ⋅107491393.

It can be written as a sum of positive squares in 2 ways, for example, as 14868736 + 143065521 = 3856^2 + 11961^2 .

It is a cyclic number.

It is not a de Polignac number, because 157934257 - 2⁷ = 157934129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157934857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6074382 + ... + 6074407.

It is an arithmetic number, because the mean of its divisors is an integer number (42520765).

Almost surely, 2^157934257 is an apocalyptic number.

It is an amenable number.

157934257 is a deficient number, since it is larger than the sum of its proper divisors (12148803).

157934257 is a wasteful number, since it uses less digits than its factorization.

157934257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12148802.

The product of its digits is 264600, while the sum is 43.

The square root of 157934257 is about 12567.1897017591. The cubic root of 157934257 is about 540.5370251983.

The spelling of 157934257 in words is "one hundred fifty-seven million, nine hundred thirty-four thousand, two hundred fifty-seven".