4244221 has 2 divisors, whose sum is σ = 4244222. Its totient is φ = 4244220.

The previous prime is 4244183. The next prime is 4244299. The reversal of 4244221 is 1224424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 264196 = 1995^2 + 514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4244221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4244021) 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 as a sum of consecutive naturals, namely, 2122110 + 2122111.

It is an arithmetic number, because the mean of its divisors is an integer number (2122111).

Almost surely, 2^4244221 is an apocalyptic number.

It is an amenable number.

4244221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4244221 is an equidigital number, since it uses as much as digits as its factorization.

4244221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4244221 is about 2060.1507226414. The cubic root of 4244221 is about 161.9071382650.

Adding to 4244221 its reverse (1224424), we get a palindrome (5468645).

It can be divided in two parts, 4244 and 221, that added together give a triangular number (4465 = T₉₄).

The spelling of 4244221 in words is "four million, two hundred forty-four thousand, two hundred twenty-one".