422685 has 32 divisors (see below), whose sum is σ = 783360. Its totient is φ = 216000.

The previous prime is 422657. The next prime is 422689. The reversal of 422685 is 586224.

It is not a de Polignac number, because 422685 - 2⁶ = 422621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422689) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4135 + ... + 4235.

It is an arithmetic number, because the mean of its divisors is an integer number (24480).

2⁴²²⁶⁸⁵ is an apocalyptic number.

422685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

422685 is a deficient number, since it is larger than the sum of its proper divisors (360675).

422685 is a wasteful number, since it uses less digits than its factorization.

422685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 140 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 422685 is about 650.1422921177. The cubic root of 422685 is about 75.0479693127.

The spelling of 422685 in words is "four hundred twenty-two thousand, six hundred eighty-five".