422009 has 12 divisors (see below), whose sum is σ = 512064. Its totient is φ = 340632.

The previous prime is 421997. The next prime is 422029. The reversal of 422009 is 900224.

It is a de Polignac number, because none of the positive numbers 2^k-422009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422029) 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, 2444 + ... + 2610.

It is an arithmetic number, because the mean of its divisors is an integer number (42672).

2⁴²²⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

422009 is a deficient number, since it is larger than the sum of its proper divisors (90055).

422009 is a wasteful number, since it uses less digits than its factorization.

422009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 422009 is about 649.6221978966. The cubic root of 422009 is about 75.0079399002.

The spelling of 422009 in words is "four hundred twenty-two thousand, nine".