257245356 has 12 divisors (see below), whose sum is σ = 600239192. Its totient is φ = 85748448.

The previous prime is 257245321. The next prime is 257245379. The reversal of 257245356 is 653542752.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10718545 + ... + 10718568.

Almost surely, 2^257245356 is an apocalyptic number.

It is an amenable number.

257245356 is an abundant number, since it is smaller than the sum of its proper divisors (342993836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257245356 is a wasteful number, since it uses less digits than its factorization.

257245356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21437120 (or 21437118 counting only the distinct ones).

The product of its digits is 252000, while the sum is 39.

The square root of 257245356 is about 16038.8701597089. The cubic root of 257245356 is about 635.9883803897.

The spelling of 257245356 in words is "two hundred fifty-seven million, two hundred forty-five thousand, three hundred fifty-six".