13684642 has 4 divisors (see below), whose sum is σ = 20526966. Its totient is φ = 6842320.

The previous prime is 13684613. The next prime is 13684651. The reversal of 13684642 is 24648631.

13684642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 7177041 + 6507601 = 2679^2 + 2551^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13684598 and 13684607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421159 + ... + 3421162.

Almost surely, 2^13684642 is an apocalyptic number.

13684642 is a deficient number, since it is larger than the sum of its proper divisors (6842324).

13684642 is an equidigital number, since it uses as much as digits as its factorization.

13684642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842323.

The product of its digits is 27648, while the sum is 34.

The square root of 13684642 is about 3699.2758750869. The cubic root of 13684642 is about 239.1908048389.

The spelling of 13684642 in words is "thirteen million, six hundred eighty-four thousand, six hundred forty-two".