422006921 has 12 divisors (see below), whose sum is σ = 503573952. Its totient is φ = 345779544.

The previous prime is 422006909. The next prime is 422006933. The reversal of 422006921 is 129600224.

It is an interprime number because it is at equal distance from previous prime (422006909) and next prime (422006933).

It is not a de Polignac number, because 422006921 - 2¹⁰ = 422005897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422006971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259850 + ... + 261468.

It is an arithmetic number, because the mean of its divisors is an integer number (41964496).

Almost surely, 2^422006921 is an apocalyptic number.

It is an amenable number.

422006921 is a deficient number, since it is larger than the sum of its proper divisors (81567031).

422006921 is an frugal number, since it uses more digits than its factorization.

422006921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 422006921 is about 20542.8070379878. The cubic root of 422006921 is about 750.0781672603.

The spelling of 422006921 in words is "four hundred twenty-two million, six thousand, nine hundred twenty-one".