12505689 has 12 divisors (see below), whose sum is σ = 20644416. Its totient is φ = 7146072.

The previous prime is 12505687. The next prime is 12505709. The reversal of 12505689 is 98650521.

It is a happy number.

12505689 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12505689 - 2¹ = 12505687 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12505681) 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, 99189 + ... + 99314.

It is an arithmetic number, because the mean of its divisors is an integer number (1720368).

Almost surely, 2^12505689 is an apocalyptic number.

It is an amenable number.

12505689 is a deficient number, since it is larger than the sum of its proper divisors (8138727).

12505689 is a wasteful number, since it uses less digits than its factorization.

12505689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198516 (or 198513 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 12505689 is about 3536.3383605079. The cubic root of 12505689 is about 232.1146443392.

The spelling of 12505689 in words is "twelve million, five hundred five thousand, six hundred eighty-nine".