4021885 has 16 divisors (see below), whose sum is σ = 5559552. Its totient is φ = 2736000.

The previous prime is 4021879. The next prime is 4021889. The reversal of 4021885 is 5881204.

It is a de Polignac number, because none of the positive numbers 2^k-4021885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4905 + ... + 5665.

It is an arithmetic number, because the mean of its divisors is an integer number (347472).

Almost surely, 2^4021885 is an apocalyptic number.

It is an amenable number.

4021885 is a deficient number, since it is larger than the sum of its proper divisors (1537667).

4021885 is a wasteful number, since it uses less digits than its factorization.

4021885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 4021885 is about 2005.4637867586. The cubic root of 4021885 is about 159.0290810829.

The spelling of 4021885 in words is "four million, twenty-one thousand, eight hundred eighty-five".