4039021 has 12 divisors (see below), whose sum is σ = 4851840. Its totient is φ = 3349080.

The previous prime is 4039019. The next prime is 4039037. The reversal of 4039021 is 1209304.

It is not a de Polignac number, because 4039021 - 2¹ = 4039019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4039021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4039051) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 190 + ... + 2848.

It is an arithmetic number, because the mean of its divisors is an integer number (404320).

Almost surely, 2^4039021 is an apocalyptic number.

It is an amenable number.

4039021 is a deficient number, since it is larger than the sum of its proper divisors (812819).

4039021 is a wasteful number, since it uses less digits than its factorization.

4039021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 4039021 is about 2009.7315741163. The cubic root of 4039021 is about 159.2546188734.

The spelling of 4039021 in words is "four million, thirty-nine thousand, twenty-one".