4226221 has 2 divisors, whose sum is σ = 4226222. Its totient is φ = 4226220.

The previous prime is 4226219. The next prime is 4226231. The reversal of 4226221 is 1226224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3204100 + 1022121 = 1790^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 4226221 - 2¹ = 4226219 is a prime.

Together with 4226219, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4226231) 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, 2113110 + 2113111.

It is an arithmetic number, because the mean of its divisors is an integer number (2113111).

Almost surely, 2^4226221 is an apocalyptic number.

It is an amenable number.

4226221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4226221 is an equidigital number, since it uses as much as digits as its factorization.

4226221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 19.

The square root of 4226221 is about 2055.7774685019. Note that the first 3 decimals coincide. The cubic root of 4226221 is about 161.6779279127.

It can be divided in two parts, 422 and 6221, that multiplied together give a palindrome (2625262).

The spelling of 4226221 in words is "four million, two hundred twenty-six thousand, two hundred twenty-one".