422518 has 16 divisors (see below), whose sum is σ = 689040. Its totient is φ = 194208.

The previous prime is 422479. The next prime is 422537. The reversal of 422518 is 815224.

422518 is nontrivially palindromic in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9805 + ... + 9847.

It is an arithmetic number, because the mean of its divisors is an integer number (43065).

2⁴²²⁵¹⁸ is an apocalyptic number.

422518 is a deficient number, since it is larger than the sum of its proper divisors (266522).

422518 is an equidigital number, since it uses as much as digits as its factorization.

422518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 62 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 422518 is about 650.0138460064. The cubic root of 422518 is about 75.0380843615.

It can be divided in two parts, 4 and 22518, that added together give a palindrome (22522).

The spelling of 422518 in words is "four hundred twenty-two thousand, five hundred eighteen".