25318645 has 12 divisors (see below), whose sum is σ = 33396300. Its totient is φ = 18413120.

The previous prime is 25318639. The next prime is 25318651. The reversal of 25318645 is 54681352.

It is an interprime number because it is at equal distance from previous prime (25318639) and next prime (25318651).

It can be written as a sum of positive squares in 2 ways, for example, as 15421329 + 9897316 = 3927^2 + 3146^2 .

It is not a de Polignac number, because 25318645 - 2⁵ = 25318613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25318645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20320 + ... + 21529.

It is an arithmetic number, because the mean of its divisors is an integer number (2783025).

Almost surely, 2^25318645 is an apocalyptic number.

It is an amenable number.

25318645 is a deficient number, since it is larger than the sum of its proper divisors (8077655).

25318645 is a wasteful number, since it uses less digits than its factorization.

25318645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41876 (or 41865 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 25318645 is about 5031.7636073250. The cubic root of 25318645 is about 293.6388310286.

Adding to 25318645 its reverse (54681352), we get a palindrome (79999997).

The spelling of 25318645 in words is "twenty-five million, three hundred eighteen thousand, six hundred forty-five".