4442221 has 4 divisors (see below), whose sum is σ = 5076832. Its totient is φ = 3807612.

The previous prime is 4442213. The next prime is 4442231. The reversal of 4442221 is 1222444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4442221 - 2³ = 4442213 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4442231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317295 + ... + 317308.

It is an arithmetic number, because the mean of its divisors is an integer number (1269208).

Almost surely, 2^4442221 is an apocalyptic number.

It is an amenable number.

4442221 is a deficient number, since it is larger than the sum of its proper divisors (634611).

4442221 is an equidigital number, since it uses as much as digits as its factorization.

4442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634610.

The product of its digits is 512, while the sum is 19.

The square root of 4442221 is about 2107.6577046570. The cubic root of 4442221 is about 164.3867162877.

Adding to 4442221 its reverse (1222444), we get a palindrome (5664665).

It can be divided in two parts, 4 and 442221, that added together give a square (442225 = 665²).

The spelling of 4442221 in words is "four million, four hundred forty-two thousand, two hundred twenty-one".