256598725 has 12 divisors (see below), whose sum is σ = 319510180. Its totient is φ = 204422400.

The previous prime is 256598701. The next prime is 256598761. The reversal of 256598725 is 527895652.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12208036 + 244390689 = 3494^2 + 15633^2 .

It is not a de Polignac number, because 256598725 - 2¹¹ = 256596677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15270 + ... + 27319.

Almost surely, 2^256598725 is an apocalyptic number.

256598725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256598725 is a deficient number, since it is larger than the sum of its proper divisors (62911455).

256598725 is a wasteful number, since it uses less digits than its factorization.

256598725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42840 (or 42835 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 49.

The square root of 256598725 is about 16018.6992293382. The cubic root of 256598725 is about 635.4550440794.

The spelling of 256598725 in words is "two hundred fifty-six million, five hundred ninety-eight thousand, seven hundred twenty-five".