422569421 has 2 divisors, whose sum is σ = 422569422. Its totient is φ = 422569420.

The previous prime is 422569397. The next prime is 422569439. The reversal of 422569421 is 124965224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415752100 + 6817321 = 20390^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 422569421 - 2²⁶ = 355460557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422509421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211284710 + 211284711.

It is an arithmetic number, because the mean of its divisors is an integer number (211284711).

Almost surely, 2^422569421 is an apocalyptic number.

It is an amenable number.

422569421 is a deficient number, since it is larger than the sum of its proper divisors (1).

422569421 is an equidigital number, since it uses as much as digits as its factorization.

422569421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 422569421 is about 20556.4934023291. The cubic root of 422569421 is about 750.4112831611.

The spelling of 422569421 in words is "four hundred twenty-two million, five hundred sixty-nine thousand, four hundred twenty-one".