25212404 has 12 divisors (see below), whose sum is σ = 50424864. Its totient is φ = 10805304.

The previous prime is 25212403. The next prime is 25212413. The reversal of 25212404 is 40421252.

It is a happy number.

25212404 is nontrivially palindromic in base 6.

25212404 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25212401) 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, 450194 + ... + 450249.

It is an arithmetic number, because the mean of its divisors is an integer number (4202072).

Almost surely, 2^25212404 is an apocalyptic number.

It is an amenable number.

25212404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25212404 is a wasteful number, since it uses less digits than its factorization.

25212404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900454 (or 900452 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 25212404 is about 5021.1954751832. The cubic root of 25212404 is about 293.2275370308.

Adding to 25212404 its reverse (40421252), we get a palindrome (65633656).

The spelling of 25212404 in words is "twenty-five million, two hundred twelve thousand, four hundred four".