3904042 has 4 divisors (see below), whose sum is σ = 5856066. Its totient is φ = 1952020.

The previous prime is 3904039. The next prime is 3904051. The reversal of 3904042 is 2404093.

3904042 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., 3493161 + 410881 = 1869^2 + 641^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976009 + ... + 976012.

Almost surely, 2^3904042 is an apocalyptic number.

3904042 is a deficient number, since it is larger than the sum of its proper divisors (1952024).

3904042 is a wasteful number, since it uses less digits than its factorization.

3904042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952023.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3904042 is about 1975.8648739223. The cubic root of 3904042 is about 157.4604519835.

The spelling of 3904042 in words is "three million, nine hundred four thousand, forty-two".