4021842 has 16 divisors (see below), whose sum is σ = 8775072. Its totient is φ = 1218720.

The previous prime is 4021777. The next prime is 4021867. The reversal of 4021842 is 2481204.

It is an Ulam number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30403 + ... + 30534.

It is an arithmetic number, because the mean of its divisors is an integer number (548442).

Almost surely, 2^4021842 is an apocalyptic number.

4021842 is an abundant number, since it is smaller than the sum of its proper divisors (4753230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021842 is a wasteful number, since it uses less digits than its factorization.

4021842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60953.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 4021842 is about 2005.4530660178. The cubic root of 4021842 is about 159.0285143275.

The spelling of 4021842 in words is "four million, twenty-one thousand, eight hundred forty-two".