12521812 has 6 divisors (see below), whose sum is σ = 21913178. Its totient is φ = 6260904.

The previous prime is 12521801. The next prime is 12521837. The reversal of 12521812 is 21812521.

12521812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11806096 + 715716 = 3436^2 + 846^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565223 + ... + 1565230.

Almost surely, 2^12521812 is an apocalyptic number.

It is an amenable number.

12521812 is a deficient number, since it is larger than the sum of its proper divisors (9391366).

12521812 is a wasteful number, since it uses less digits than its factorization.

12521812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130457 (or 3130455 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 12521812 is about 3538.6172440658. The cubic root of 12521812 is about 232.2143530203.

The spelling of 12521812 in words is "twelve million, five hundred twenty-one thousand, eight hundred twelve".