4022239 has 4 divisors (see below), whose sum is σ = 4331656. Its totient is φ = 3712824.

The previous prime is 4022203. The next prime is 4022257. The reversal of 4022239 is 9322204.

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

It is a cyclic number.

It is not a de Polignac number, because 4022239 - 2⁷ = 4022111 is a prime.

It is a Duffinian 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 (4022339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154689 + ... + 154714.

It is an arithmetic number, because the mean of its divisors is an integer number (1082914).

Almost surely, 2^4022239 is an apocalyptic number.

4022239 is a deficient number, since it is larger than the sum of its proper divisors (309417).

4022239 is a wasteful number, since it uses less digits than its factorization.

4022239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309416.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 4022239 is about 2005.5520437027. The cubic root of 4022239 is about 159.0337467760.

The spelling of 4022239 in words is "four million, twenty-two thousand, two hundred thirty-nine".