12521804 has 6 divisors (see below), whose sum is σ = 21913164. Its totient is φ = 6260900.

The previous prime is 12521801. The next prime is 12521837. The reversal of 12521804 is 40812521.

12521804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12521804.

It is not an unprimeable number, because it can be changed into a prime (12521801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565222 + ... + 1565229.

It is an arithmetic number, because the mean of its divisors is an integer number (3652194).

Almost surely, 2^12521804 is an apocalyptic number.

It is an amenable number.

12521804 is a deficient number, since it is larger than the sum of its proper divisors (9391360).

12521804 is a wasteful number, since it uses less digits than its factorization.

12521804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130455 (or 3130453 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 12521804 is about 3538.6161136806. The cubic root of 12521804 is about 232.2143035675.

The spelling of 12521804 in words is "twelve million, five hundred twenty-one thousand, eight hundred four".