257034945 has 32 divisors (see below), whose sum is σ = 443479680. Its totient is φ = 126696960.

The previous prime is 257034941. The next prime is 257034949. The reversal of 257034945 is 549430752.

It is an interprime number because it is at equal distance from previous prime (257034941) and next prime (257034949).

It is not a de Polignac number, because 257034945 - 2² = 257034941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257034941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 687 + ... + 22683.

It is an arithmetic number, because the mean of its divisors is an integer number (13858740).

Almost surely, 2^257034945 is an apocalyptic number.

It is an amenable number.

257034945 is a deficient number, since it is larger than the sum of its proper divisors (186444735).

257034945 is a wasteful number, since it uses less digits than its factorization.

257034945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22065.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 257034945 is about 16032.3094094394. The cubic root of 257034945 is about 635.8149331991.

The spelling of 257034945 in words is "two hundred fifty-seven million, thirty-four thousand, nine hundred forty-five".