12521886 has 48 divisors (see below), whose sum is σ = 27748656. Its totient is φ = 3763968.

The previous prime is 12521863. The next prime is 12521891. The reversal of 12521886 is 68812521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53626 + ... + 53858.

It is an arithmetic number, because the mean of its divisors is an integer number (578097).

Almost surely, 2^12521886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12521886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13874328).

12521886 is an abundant number, since it is smaller than the sum of its proper divisors (15226770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12521886 is a wasteful number, since it uses less digits than its factorization.

12521886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 304 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 12521886 is about 3538.6277001120. The cubic root of 12521886 is about 232.2148104575.

The spelling of 12521886 in words is "twelve million, five hundred twenty-one thousand, eight hundred eighty-six".