1422221 has 2 divisors, whose sum is σ = 1422222. Its totient is φ = 1422220.

The previous prime is 1422199. The next prime is 1422227. The reversal of 1422221 is 1222241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1406596 + 15625 = 1186^2 + 125^2 .

It is an emirp because it is prime and its reverse (1222241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1422221 - 2¹⁸ = 1160077 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1422196 and 1422205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1422227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711110 + 711111.

It is an arithmetic number, because the mean of its divisors is an integer number (711111).

2^1422221 is an apocalyptic number.

It is an amenable number.

1422221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1422221 is an equidigital number, since it uses as much as digits as its factorization.

1422221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 14.

The square root of 1422221 is about 1192.5690755675. The cubic root of 1422221 is about 112.4576564924.

Adding to 1422221 its reverse (1222241), we get a palindrome (2644462).

The spelling of 1422221 in words is "one million, four hundred twenty-two thousand, two hundred twenty-one".