422348921 has 4 divisors (see below), whose sum is σ = 422528100. Its totient is φ = 422169744.

The previous prime is 422348887. The next prime is 422348939. The reversal of 422348921 is 129843224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78765625 + 343583296 = 8875^2 + 18536^2 .

It is a cyclic number.

It is not a de Polignac number, because 422348921 - 2¹⁰ = 422347897 is a prime.

It is a super-2 number, since 2×422348921² = 356757222139728482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422348951) 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 in 3 ways as a sum of consecutive naturals, for example, 86006 + ... + 90783.

It is an arithmetic number, because the mean of its divisors is an integer number (105632025).

Almost surely, 2^422348921 is an apocalyptic number.

It is an amenable number.

422348921 is a deficient number, since it is larger than the sum of its proper divisors (179179).

422348921 is a wasteful number, since it uses less digits than its factorization.

422348921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179178.

The product of its digits is 27648, while the sum is 35.

The square root of 422348921 is about 20551.1294336832. The cubic root of 422348921 is about 750.2807369766.

The spelling of 422348921 in words is "four hundred twenty-two million, three hundred forty-eight thousand, nine hundred twenty-one".