422005 has 4 divisors (see below), whose sum is σ = 506412. Its totient is φ = 337600.

The previous prime is 421997. The next prime is 422029. The reversal of 422005 is 500224.

It is a happy number.

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 69169 + 352836 = 263^2 + 594^2 .

It is not a de Polignac number, because 422005 - 2³ = 421997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42196 + ... + 42205.

It is an arithmetic number, because the mean of its divisors is an integer number (126603).

2⁴²²⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

422005 is a deficient number, since it is larger than the sum of its proper divisors (84407).

422005 is an equidigital number, since it uses as much as digits as its factorization.

422005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84406.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 422005 is about 649.6191191768. The cubic root of 422005 is about 75.0077029125.

Adding to 422005 its reverse (500224), we get a palindrome (922229).

The spelling of 422005 in words is "four hundred twenty-two thousand, five".