4021994 has 8 divisors (see below), whose sum is σ = 6044448. Its totient is φ = 2007180.

The previous prime is 4021973. The next prime is 4022003. The reversal of 4021994 is 4991204.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 332 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (755556).

Almost surely, 2^4021994 is an apocalyptic number.

4021994 is a deficient number, since it is larger than the sum of its proper divisors (2022454).

4021994 is a wasteful number, since it uses less digits than its factorization.

4021994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 4021994 is about 2005.4909623332. The cubic root of 4021994 is about 159.0305177238.

The spelling of 4021994 in words is "four million, twenty-one thousand, nine hundred ninety-four".