25642004 has 12 divisors (see below), whose sum is σ = 44946804. Its totient is φ = 12800064.

The previous prime is 25641989. The next prime is 25642007. The reversal of 25642004 is 40024652.

It can be written as a sum of positive squares in 2 ways, for example, as 18079504 + 7562500 = 4252^2 + 2750^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25642007) 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, 2297 + ... + 7520.

It is an arithmetic number, because the mean of its divisors is an integer number (3745567).

Almost surely, 2^25642004 is an apocalyptic number.

It is an amenable number.

25642004 is a deficient number, since it is larger than the sum of its proper divisors (19304800).

25642004 is a wasteful number, since it uses less digits than its factorization.

25642004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10474 (or 10472 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 25642004 is about 5063.7934397051. The cubic root of 25642004 is about 294.8836235396.

Adding to 25642004 its reverse (40024652), we get a palindrome (65666656).

The spelling of 25642004 in words is "twenty-five million, six hundred forty-two thousand, four".