25625657 has 4 divisors (see below), whose sum is σ = 26739840. Its totient is φ = 24511476.

The previous prime is 25625653. The next prime is 25625671. The reversal of 25625657 is 75652652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25625657 - 2² = 25625653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25625657.

It is not an unprimeable number, because it can be changed into a prime (25625651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557057 + ... + 557102.

It is an arithmetic number, because the mean of its divisors is an integer number (6684960).

Almost surely, 2^25625657 is an apocalyptic number.

It is an amenable number.

25625657 is a deficient number, since it is larger than the sum of its proper divisors (1114183).

25625657 is a wasteful number, since it uses less digits than its factorization.

25625657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114182.

The product of its digits is 126000, while the sum is 38.

The square root of 25625657 is about 5062.1790762477. The cubic root of 25625657 is about 294.8209465959.

The spelling of 25625657 in words is "twenty-five million, six hundred twenty-five thousand, six hundred fifty-seven".