13856042 has 4 divisors (see below), whose sum is σ = 20784066. Its totient is φ = 6928020.

The previous prime is 13856027. The next prime is 13856053. The reversal of 13856042 is 24065831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24065831 = 137 ⋅175663.

It can be written as a sum of positive squares in only one way, i.e., 13845841 + 10201 = 3721^2 + 101^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13855996 and 13856014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3464009 + ... + 3464012.

Almost surely, 2^13856042 is an apocalyptic number.

13856042 is a deficient number, since it is larger than the sum of its proper divisors (6928024).

13856042 is an equidigital number, since it uses as much as digits as its factorization.

13856042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928023.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 13856042 is about 3722.3704812928. The cubic root of 13856042 is about 240.1852851598.

The spelling of 13856042 in words is "thirteen million, eight hundred fifty-six thousand, forty-two".