12739686 has 8 divisors (see below), whose sum is σ = 25479384. Its totient is φ = 4246560.

The previous prime is 12739673. The next prime is 12739687. The reversal of 12739686 is 68693721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

12739686 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061635 + ... + 1061646.

It is an arithmetic number, because the mean of its divisors is an integer number (3184923).

Almost surely, 2^12739686 is an apocalyptic number.

12739686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12739686 is a wasteful number, since it uses less digits than its factorization.

12739686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123286.

The product of its digits is 108864, while the sum is 42.

The square root of 12739686 is about 3569.2696731965. The cubic root of 12739686 is about 233.5534254390.

The spelling of 12739686 in words is "twelve million, seven hundred thirty-nine thousand, six hundred eighty-six".