1423026221 has 2 divisors, whose sum is σ = 1423026222. Its totient is φ = 1423026220.

The previous prime is 1423026197. The next prime is 1423026281. The reversal of 1423026221 is 1226203241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 987844900 + 435181321 = 31430^2 + 20861^2 .

It is an emirp because it is prime and its reverse (1226203241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423026221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423026281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711513110 + 711513111.

It is an arithmetic number, because the mean of its divisors is an integer number (711513111).

Almost surely, 2^1423026221 is an apocalyptic number.

It is an amenable number.

1423026221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423026221 is an equidigital number, since it uses as much as digits as its factorization.

1423026221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1423026221 is about 37723.0197757285. The cubic root of 1423026221 is about 1124.7887592844.

Adding to 1423026221 its reverse (1226203241), we get a palindrome (2649229462).

The spelling of 1423026221 in words is "one billion, four hundred twenty-three million, twenty-six thousand, two hundred twenty-one".