25105657 has 2 divisors, whose sum is σ = 25105658. Its totient is φ = 25105656.

The previous prime is 25105609. The next prime is 25105667. The reversal of 25105657 is 75650152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15594601 + 9511056 = 3949^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 25105657 - 2²³ = 16717049 is a prime.

It is not a weakly prime, because it can be changed into another prime (25105607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12552828 + 12552829.

It is an arithmetic number, because the mean of its divisors is an integer number (12552829).

Almost surely, 2^25105657 is an apocalyptic number.

It is an amenable number.

25105657 is a deficient number, since it is larger than the sum of its proper divisors (1).

25105657 is an equidigital number, since it uses as much as digits as its factorization.

25105657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 25105657 is about 5010.5545601261. The cubic root of 25105657 is about 292.8131188009.

The spelling of 25105657 in words is "twenty-five million, one hundred five thousand, six hundred fifty-seven".