422909 has 4 divisors (see below), whose sum is σ = 447804. Its totient is φ = 398016.

The previous prime is 422899. The next prime is 422911. The reversal of 422909 is 909224.

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 120409 + 302500 = 347^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 422909 - 2⁴ = 422893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12422 + ... + 12455.

It is an arithmetic number, because the mean of its divisors is an integer number (111951).

2⁴²²⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

422909 is a deficient number, since it is larger than the sum of its proper divisors (24895).

422909 is a wasteful number, since it uses less digits than its factorization.

422909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24894.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 422909 is about 650.3145392808. The cubic root of 422909 is about 75.0612240820.

It can be divided in two parts, 422 and 909, that added together give a palindrome (1331).

The spelling of 422909 in words is "four hundred twenty-two thousand, nine hundred nine".