12521889 has 12 divisors (see below), whose sum is σ = 18257616. Its totient is φ = 8269272.

The previous prime is 12521863. The next prime is 12521891. The reversal of 12521889 is 98812521.

12521889 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12521889 - 2⁵ = 12521857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12521189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5539 + ... + 7464.

It is an arithmetic number, because the mean of its divisors is an integer number (1521468).

Almost surely, 2^12521889 is an apocalyptic number.

It is an amenable number.

12521889 is a deficient number, since it is larger than the sum of its proper divisors (5735727).

12521889 is a wasteful number, since it uses less digits than its factorization.

12521889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13116 (or 13113 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 12521889 is about 3538.6281240051. The cubic root of 12521889 is about 232.2148290022.

Subtracting from 12521889 its product of digits (11520), we obtain a square (12510369 = 3537²).

The spelling of 12521889 in words is "twelve million, five hundred twenty-one thousand, eight hundred eighty-nine".