25508012 has 12 divisors (see below), whose sum is σ = 46580016. Its totient is φ = 12199440.

The previous prime is 25508003. The next prime is 25508017. The reversal of 25508012 is 21080552.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (25508017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138539 + ... + 138722.

It is an arithmetic number, because the mean of its divisors is an integer number (3881668).

Almost surely, 2^25508012 is an apocalyptic number.

It is an amenable number.

25508012 is a deficient number, since it is larger than the sum of its proper divisors (21072004).

25508012 is a wasteful number, since it uses less digits than its factorization.

25508012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277288 (or 277286 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 25508012 is about 5050.5457130888. The cubic root of 25508012 is about 294.3690892591.

Adding to 25508012 its reverse (21080552), we get a palindrome (46588564).

The spelling of 25508012 in words is "twenty-five million, five hundred eight thousand, twelve".