12805686 has 12 divisors (see below), whose sum is σ = 27745692. Its totient is φ = 4268556.

The previous prime is 12805679. The next prime is 12805691. The reversal of 12805686 is 68650821.

It is a happy number.

12805686 is a `hidden beast` number, since 12 + 80 + 568 + 6 = 666.

12805686 is digitally balanced in base 2 and base 4, because in such bases 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 12805686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355696 + ... + 355731.

It is an arithmetic number, because the mean of its divisors is an integer number (2312141).

Almost surely, 2^12805686 is an apocalyptic number.

12805686 is an abundant number, since it is smaller than the sum of its proper divisors (14940006).

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

12805686 is a wasteful number, since it uses less digits than its factorization.

12805686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711435 (or 711432 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 12805686 is about 3578.5033184280. The cubic root of 12805686 is about 233.9560513562.

The spelling of 12805686 in words is "twelve million, eight hundred five thousand, six hundred eighty-six".