13521686 has 8 divisors (see below), whose sum is σ = 20386080. Its totient is φ = 6726328.

The previous prime is 13521667. The next prime is 13521701. The reversal of 13521686 is 68612531.

It is a happy number.

13521686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16766 + ... + 17553.

It is an arithmetic number, because the mean of its divisors is an integer number (2548260).

Almost surely, 2^13521686 is an apocalyptic number.

13521686 is a deficient number, since it is larger than the sum of its proper divisors (6864394).

13521686 is a wasteful number, since it uses less digits than its factorization.

13521686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34518.

The product of its digits is 8640, while the sum is 32.

The square root of 13521686 is about 3677.1845207985. The cubic root of 13521686 is about 238.2375872874.

The spelling of 13521686 in words is "thirteen million, five hundred twenty-one thousand, six hundred eighty-six".