4439221 has 4 divisors (see below), whose sum is σ = 4443552. Its totient is φ = 4434892.

The previous prime is 4439213. The next prime is 4439257. The reversal of 4439221 is 1229344.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4439221 - 2³ = 4439213 is a prime.

It is a d-powerful number, because it can be written as 4² + 4¹¹ + 3¹¹ + 9⁵ + 2⁹ + 2¹³ + 1 .

It is a Duffinian number.

4439221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4439821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336 + ... + 2998.

It is an arithmetic number, because the mean of its divisors is an integer number (1110888).

Almost surely, 2^4439221 is an apocalyptic number.

It is an amenable number.

4439221 is a deficient number, since it is larger than the sum of its proper divisors (4331).

4439221 is a wasteful number, since it uses less digits than its factorization.

4439221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330.

The product of its digits is 1728, while the sum is 25.

The square root of 4439221 is about 2106.9458939422. The cubic root of 4439221 is about 164.3497024300.

The spelling of 4439221 in words is "four million, four hundred thirty-nine thousand, two hundred twenty-one".