25397957 has 16 divisors (see below), whose sum is σ = 28764288. Its totient is φ = 22249920.

The previous prime is 25397951. The next prime is 25397987. The reversal of 25397957 is 75979352.

It is a cyclic number.

It is not a de Polignac number, because 25397957 - 2⁶ = 25397893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25397951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51482 + ... + 51972.

It is an arithmetic number, because the mean of its divisors is an integer number (1797768).

Almost surely, 2^25397957 is an apocalyptic number.

It is an amenable number.

25397957 is a deficient number, since it is larger than the sum of its proper divisors (3366331).

25397957 is a wasteful number, since it uses less digits than its factorization.

25397957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its digits is 595350, while the sum is 47.

The square root of 25397957 is about 5039.6385783109. The cubic root of 25397957 is about 293.9451245013.

The spelling of 25397957 in words is "twenty-five million, three hundred ninety-seven thousand, nine hundred fifty-seven".