157890257 has 8 divisors (see below), whose sum is σ = 183139776. Its totient is φ = 133314192.

The previous prime is 157890251. The next prime is 157890259. The reversal of 157890257 is 752098751.

157890257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 157890257 - 2⁴ = 157890241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157890251) 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, 167858 + ... + 168795.

It is an arithmetic number, because the mean of its divisors is an integer number (22892472).

Almost surely, 2^157890257 is an apocalyptic number.

It is an amenable number.

157890257 is a deficient number, since it is larger than the sum of its proper divisors (25249519).

157890257 is an equidigital number, since it uses as much as digits as its factorization.

157890257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336727.

The product of its (nonzero) digits is 176400, while the sum is 44.

The square root of 157890257 is about 12565.4389895459. The cubic root of 157890257 is about 540.4868232164.

The spelling of 157890257 in words is "one hundred fifty-seven million, eight hundred ninety thousand, two hundred fifty-seven".