4021942 has 4 divisors (see below), whose sum is σ = 6032916. Its totient is φ = 2010970.

The previous prime is 4021933. The next prime is 4021949. The reversal of 4021942 is 2491204.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005484 + ... + 1005487.

It is an arithmetic number, because the mean of its divisors is an integer number (1508229).

Almost surely, 2^4021942 is an apocalyptic number.

4021942 is a deficient number, since it is larger than the sum of its proper divisors (2010974).

4021942 is a wasteful number, since it uses less digits than its factorization.

4021942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010973.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 4021942 is about 2005.4779978848. The cubic root of 4021942 is about 159.0298323571.

The spelling of 4021942 in words is "four million, twenty-one thousand, nine hundred forty-two".