1422542221 has 2 divisors, whose sum is σ = 1422542222. Its totient is φ = 1422542220.

The previous prime is 1422542189. The next prime is 1422542237. The reversal of 1422542221 is 1222452241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 805764996 + 616777225 = 28386^2 + 24835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1422542221 - 2⁵ = 1422542189 is a prime.

It is a super-2 number, since 2×1422542221² = 4047252741055225682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1422542281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711271110 + 711271111.

It is an arithmetic number, because the mean of its divisors is an integer number (711271111).

Almost surely, 2^1422542221 is an apocalyptic number.

It is an amenable number.

1422542221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1422542221 is an equidigital number, since it uses as much as digits as its factorization.

1422542221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560, while the sum is 25.

The square root of 1422542221 is about 37716.6040491453. The cubic root of 1422542221 is about 1124.6612236885.

Adding to 1422542221 its reverse (1222452241), we get a palindrome (2644994462).

The spelling of 1422542221 in words is "one billion, four hundred twenty-two million, five hundred forty-two thousand, two hundred twenty-one".