3994742 has 12 divisors (see below), whose sum is σ = 6162660. Its totient is φ = 1942056.

The previous prime is 3994733. The next prime is 3994747. The reversal of 3994742 is 2474993.

It is a junction number, because it is equal to n+sod(n) for n = 3994696 and 3994705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2009 + ... + 3467.

It is an arithmetic number, because the mean of its divisors is an integer number (513555).

Almost surely, 2^3994742 is an apocalyptic number.

3994742 is a deficient number, since it is larger than the sum of its proper divisors (2167918).

3994742 is a wasteful number, since it uses less digits than its factorization.

3994742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535 (or 1498 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 3994742 is about 1998.6850677383. The cubic root of 3994742 is about 158.6705200753.

The spelling of 3994742 in words is "three million, nine hundred ninety-four thousand, seven hundred forty-two".