12521908 has 12 divisors (see below), whose sum is σ = 25043872. Its totient is φ = 5366520.

The previous prime is 12521903. The next prime is 12521921. The reversal of 12521908 is 80912521.

12521908 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 447211 = 12521908 / (1 + 2 + 5 + 2 + 1 + 9 + 0 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223578 + ... + 223633.

Almost surely, 2^12521908 is an apocalyptic number.

It is an amenable number.

12521908 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.

12521908 is a wasteful number, since it uses less digits than its factorization.

12521908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447222 (or 447220 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12521908 is about 3538.6308086603. The cubic root of 12521908 is about 232.2149464520.

It can be divided in two parts, 1252 and 1908, that added together give a triangular number (3160 = T₇₉).

The spelling of 12521908 in words is "twelve million, five hundred twenty-one thousand, nine hundred eight".