4444221 has 16 divisors (see below), whose sum is σ = 6399360. Its totient is φ = 2735040.

The previous prime is 4444217. The next prime is 4444229. The reversal of 4444221 is 1224444.

It is not a de Polignac number, because 4444221 - 2² = 4444217 is a prime.

It is a super-3 number, since 3×4444221³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (4444229) 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 15 ways as a sum of consecutive naturals, for example, 891 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (399960).

Almost surely, 2^4444221 is an apocalyptic number.

It is an amenable number.

4444221 is a deficient number, since it is larger than the sum of its proper divisors (1955139).

4444221 is a wasteful number, since it uses less digits than its factorization.

4444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its digits is 1024, while the sum is 21.

The square root of 4444221 is about 2108.1321116097. The cubic root of 4444221 is about 164.4113829356.

Adding to 4444221 its reverse (1224444), we get a palindrome (5668665).

The spelling of 4444221 in words is "four million, four hundred forty-four thousand, two hundred twenty-one".