422127491 has 2 divisors, whose sum is σ = 422127492. Its totient is φ = 422127490.

The previous prime is 422127481. The next prime is 422127521. The reversal of 422127491 is 194721224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422127491 - 2¹⁸ = 421865347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422127481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211063745 + 211063746.

It is an arithmetic number, because the mean of its divisors is an integer number (211063746).

Almost surely, 2^422127491 is an apocalyptic number.

422127491 is a deficient number, since it is larger than the sum of its proper divisors (1).

422127491 is an equidigital number, since it uses as much as digits as its factorization.

422127491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 422127491 is about 20545.7414322287. The cubic root of 422127491 is about 750.1495944563.

The spelling of 422127491 in words is "four hundred twenty-two million, one hundred twenty-seven thousand, four hundred ninety-one".