157430257 has 8 divisors (see below), whose sum is σ = 165974400. Its totient is φ = 148911984.

The previous prime is 157430249. The next prime is 157430263. The reversal of 157430257 is 752034751.

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 157430257 - 2³ = 157430249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157430297) 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 7 ways as a sum of consecutive naturals, for example, 6744 + ... + 18982.

It is an arithmetic number, because the mean of its divisors is an integer number (20746800).

Almost surely, 2^157430257 is an apocalyptic number.

It is an amenable number.

157430257 is a deficient number, since it is larger than the sum of its proper divisors (8544143).

157430257 is a wasteful number, since it uses less digits than its factorization.

157430257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12935.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 157430257 is about 12547.1214627101. The cubic root of 157430257 is about 539.9614249994.

It can be divided in two parts, 157430 and 257, that multiplied together give a triangular number (40459510 = T₈₉₉₅).

The spelling of 157430257 in words is "one hundred fifty-seven million, four hundred thirty thousand, two hundred fifty-seven".