4021684 has 12 divisors (see below), whose sum is σ = 7056000. Its totient is φ = 2005688.

The previous prime is 4021663. The next prime is 4021727. The reversal of 4021684 is 4861204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867 + ... + 2965.

It is an arithmetic number, because the mean of its divisors is an integer number (588000).

Almost surely, 2^4021684 is an apocalyptic number.

It is an amenable number.

4021684 is a deficient number, since it is larger than the sum of its proper divisors (3034316).

4021684 is a wasteful number, since it uses less digits than its factorization.

4021684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582 (or 2580 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 4021684 is about 2005.4136730361. The cubic root of 4021684 is about 159.0264317963.

Adding to 4021684 its reverse (4861204), we get a palindrome (8882888).

The spelling of 4021684 in words is "four million, twenty-one thousand, six hundred eighty-four".