25640124 has 24 divisors (see below), whose sum is σ = 62428800. Its totient is φ = 8175024.

The previous prime is 25640081. The next prime is 25640171. The reversal of 25640124 is 42104652.

It is a junction number, because it is equal to n+sod(n) for n = 25640094 and 25640103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46174 + ... + 46725.

It is an arithmetic number, because the mean of its divisors is an integer number (2601200).

Almost surely, 2^25640124 is an apocalyptic number.

It is an amenable number.

25640124 is an abundant number, since it is smaller than the sum of its proper divisors (36788676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25640124 is a wasteful number, since it uses less digits than its factorization.

25640124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92929 (or 92927 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25640124 is about 5063.6078047179. The cubic root of 25640124 is about 294.8764166827.

Adding to 25640124 its reverse (42104652), we get a palindrome (67744776).

The spelling of 25640124 in words is "twenty-five million, six hundred forty thousand, one hundred twenty-four".