25320957 has 4 divisors (see below), whose sum is σ = 33761280. Its totient is φ = 16880636.

The previous prime is 25320947. The next prime is 25320961. The reversal of 25320957 is 75902352.

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 25320957 - 2⁷ = 25320829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25320947) 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, 4220157 + ... + 4220162.

It is an arithmetic number, because the mean of its divisors is an integer number (8440320).

Almost surely, 2^25320957 is an apocalyptic number.

It is an amenable number.

25320957 is a deficient number, since it is larger than the sum of its proper divisors (8440323).

25320957 is an equidigital number, since it uses as much as digits as its factorization.

25320957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8440322.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 25320957 is about 5031.9933426029. The cubic root of 25320957 is about 293.6477687411.

The spelling of 25320957 in words is "twenty-five million, three hundred twenty thousand, nine hundred fifty-seven".