13806742 has 4 divisors (see below), whose sum is σ = 20710116. Its totient is φ = 6903370.

The previous prime is 13806733. The next prime is 13806761. The reversal of 13806742 is 24760831.

13806742 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, and also an emirpimes, since its reverse is a distinct semiprime: 24760831 = 4357 ⋅5683.

It is a super-2 number, since 2×13806742² = 381252249309128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 3451684 + ... + 3451687.

It is an arithmetic number, because the mean of its divisors is an integer number (5177529).

Almost surely, 2^13806742 is an apocalyptic number.

13806742 is a deficient number, since it is larger than the sum of its proper divisors (6903374).

13806742 is an equidigital number, since it uses as much as digits as its factorization.

13806742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6903373.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 13806742 is about 3715.7424560914. The cubic root of 13806742 is about 239.9000857253.

The spelling of 13806742 in words is "thirteen million, eight hundred six thousand, seven hundred forty-two".