25616725 has 6 divisors (see below), whose sum is σ = 31764770. Its totient is φ = 20493360.

The previous prime is 25616711. The next prime is 25616741. The reversal of 25616725 is 52761652.

It can be written as a sum of positive squares in 3 ways, for example, as 2643876 + 22972849 = 1626^2 + 4793^2 .

It is not a de Polignac number, because 25616725 - 2⁷ = 25616597 is a prime.

It is an alternating number because its digits alternate between even and odd.

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, 512310 + ... + 512359.

Almost surely, 2^25616725 is an apocalyptic number.

25616725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25616725 is a deficient number, since it is larger than the sum of its proper divisors (6148045).

25616725 is a wasteful number, since it uses less digits than its factorization.

25616725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024679 (or 1024674 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 25616725 is about 5061.2967705915. The cubic root of 25616725 is about 294.7866886553.

The spelling of 25616725 in words is "twenty-five million, six hundred sixteen thousand, seven hundred twenty-five".