422602021 has 2 divisors, whose sum is σ = 422602022. Its totient is φ = 422602020.

The previous prime is 422602001. The next prime is 422602087. The reversal of 422602021 is 120206224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299636100 + 122965921 = 17310^2 + 11089^2 .

It is a cyclic number.

It is not a de Polignac number, because 422602021 - 2¹¹ = 422599973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 422602021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422602001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211301010 + 211301011.

It is an arithmetic number, because the mean of its divisors is an integer number (211301011).

Almost surely, 2^422602021 is an apocalyptic number.

It is an amenable number.

422602021 is a deficient number, since it is larger than the sum of its proper divisors (1).

422602021 is an equidigital number, since it uses as much as digits as its factorization.

422602021 is an evil number, because the sum of its binary digits is even.

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

The square root of 422602021 is about 20557.2863238318. The cubic root of 422602021 is about 750.4305800131.

Adding to 422602021 its reverse (120206224), we get a palindrome (542808245).

The spelling of 422602021 in words is "four hundred twenty-two million, six hundred two thousand, twenty-one".