3942685 has 4 divisors (see below), whose sum is σ = 4731228. Its totient is φ = 3154144.

The previous prime is 3942677. The next prime is 3942721. The reversal of 3942685 is 5862493.

3942685 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 2 ways, for example, as 1734489 + 2208196 = 1317^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 3942685 - 2³ = 3942677 is a prime.

It is a Duffinian number.

It is a congruent 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 in 3 ways as a sum of consecutive naturals, for example, 394264 + ... + 394273.

It is an arithmetic number, because the mean of its divisors is an integer number (1182807).

Almost surely, 2^3942685 is an apocalyptic number.

It is an amenable number.

3942685 is a deficient number, since it is larger than the sum of its proper divisors (788543).

3942685 is an equidigital number, since it uses as much as digits as its factorization.

3942685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788542.

The product of its digits is 51840, while the sum is 37.

The square root of 3942685 is about 1985.6195506693. The cubic root of 3942685 is about 157.9782723955.

It can be divided in two parts, 39 and 42685, that added together give a palindrome (42724).

The spelling of 3942685 in words is "three million, nine hundred forty-two thousand, six hundred eighty-five".