13686742 has 4 divisors (see below), whose sum is σ = 20530116. Its totient is φ = 6843370.

The previous prime is 13686727. The next prime is 13686763. The reversal of 13686742 is 24768631.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421684 + ... + 3421687.

It is an arithmetic number, because the mean of its divisors is an integer number (5132529).

Almost surely, 2^13686742 is an apocalyptic number.

13686742 is a deficient number, since it is larger than the sum of its proper divisors (6843374).

13686742 is an equidigital number, since it uses as much as digits as its factorization.

13686742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843373.

The product of its digits is 48384, while the sum is 37.

The square root of 13686742 is about 3699.5597035323. The cubic root of 13686742 is about 239.2030393569.

The spelling of 13686742 in words is "thirteen million, six hundred eighty-six thousand, seven hundred forty-two".