257245339 has 8 divisors (see below), whose sum is σ = 277158672. Its totient is φ = 237349920.

The previous prime is 257245321. The next prime is 257245379. The reversal of 257245339 is 933542752.

257245339 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 257245339 - 2¹³ = 257237147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257245379) 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, 49704 + ... + 54634.

It is an arithmetic number, because the mean of its divisors is an integer number (34644834).

Almost surely, 2^257245339 is an apocalyptic number.

257245339 is a deficient number, since it is larger than the sum of its proper divisors (19913333).

257245339 is a wasteful number, since it uses less digits than its factorization.

257245339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957.

The product of its digits is 226800, while the sum is 40.

The square root of 257245339 is about 16038.8696297464. The cubic root of 257245339 is about 635.9883663800.

The spelling of 257245339 in words is "two hundred fifty-seven million, two hundred forty-five thousand, three hundred thirty-nine".