4221239 has 8 divisors (see below), whose sum is σ = 4753920. Its totient is φ = 3713400.

The previous prime is 4221229. The next prime is 4221247. The reversal of 4221239 is 9321224.

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

It is a cyclic number.

It is not a de Polignac number, because 4221239 - 2⁴ = 4221223 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 (4221209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5849 + ... + 6530.

It is an arithmetic number, because the mean of its divisors is an integer number (594240).

Almost surely, 2^4221239 is an apocalyptic number.

4221239 is a deficient number, since it is larger than the sum of its proper divisors (532681).

4221239 is a wasteful number, since it uses less digits than its factorization.

4221239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12421.

The product of its digits is 864, while the sum is 23.

The square root of 4221239 is about 2054.5654041670. The cubic root of 4221239 is about 161.6143726188.

It can be divided in two parts, 422 and 1239, that added together give a palindrome (1661).

The spelling of 4221239 in words is "four million, two hundred twenty-one thousand, two hundred thirty-nine".