422905 has 16 divisors (see below), whose sum is σ = 595584. Its totient is φ = 282240.

The previous prime is 422899. The next prime is 422911. The reversal of 422905 is 509224.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (422899) and next prime (422911).

It is not a de Polignac number, because 422905 - 2³ = 422897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1365 + ... + 1645.

It is an arithmetic number, because the mean of its divisors is an integer number (37224).

2⁴²²⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

422905 is a deficient number, since it is larger than the sum of its proper divisors (172679).

422905 is a wasteful number, since it uses less digits than its factorization.

422905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 422905 is about 650.3114638387. The cubic root of 422905 is about 75.0609874307.

The spelling of 422905 in words is "four hundred twenty-two thousand, nine hundred five".