257204725 has 6 divisors (see below), whose sum is σ = 318933890. Its totient is φ = 205763760.

The previous prime is 257204719. The next prime is 257204743. The reversal of 257204725 is 527402752.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 46867716 + 210337009 = 6846^2 + 14503^2 .

It is a de Polignac number, because none of the positive numbers 2^k-257204725 is a prime.

It is a congruent number.

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, 5144070 + ... + 5144119.

Almost surely, 2^257204725 is an apocalyptic number.

257204725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257204725 is a deficient number, since it is larger than the sum of its proper divisors (61729165).

257204725 is a wasteful number, since it uses less digits than its factorization.

257204725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10288199 (or 10288194 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 257204725 is about 16037.6034680996. The cubic root of 257204725 is about 635.9548945834.

The spelling of 257204725 in words is "two hundred fifty-seven million, two hundred four thousand, seven hundred twenty-five".