257265484 has 18 divisors (see below), whose sum is σ = 523719420. Its totient is φ = 110256552.

The previous prime is 257265443. The next prime is 257265493. The reversal of 257265484 is 484562752.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 257265484.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656094 + ... + 656485.

Almost surely, 2^257265484 is an apocalyptic number.

It is an amenable number.

257265484 is an abundant number, since it is smaller than the sum of its proper divisors (266453936).

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

257265484 is a wasteful number, since it uses less digits than its factorization.

257265484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312597 (or 1312588 counting only the distinct ones).

The product of its digits is 537600, while the sum is 43.

The square root of 257265484 is about 16039.4976230554. The cubic root of 257265484 is about 636.0049674599.

The spelling of 257265484 in words is "two hundred fifty-seven million, two hundred sixty-five thousand, four hundred eighty-four".