422865 has 12 divisors (see below), whose sum is σ = 733044. Its totient is φ = 225504.

The previous prime is 422861. The next prime is 422867. The reversal of 422865 is 568224.

422865 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51984 + 370881 = 228^2 + 609^2 .

It is not a de Polignac number, because 422865 - 2² = 422861 is a prime.

422865 is strictly pandigital in base 7.

It is not an unprimeable number, because it can be changed into a prime (422861) 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 11 ways as a sum of consecutive naturals, for example, 4654 + ... + 4743.

It is an arithmetic number, because the mean of its divisors is an integer number (61087).

2⁴²²⁸⁶⁵ is an apocalyptic number.

422865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

422865 is a deficient number, since it is larger than the sum of its proper divisors (310179).

422865 is a wasteful number, since it uses less digits than its factorization.

422865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9408 (or 9405 counting only the distinct ones).

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

The square root of 422865 is about 650.2807086174. The cubic root of 422865 is about 75.0586208360.

The spelling of 422865 in words is "four hundred twenty-two thousand, eight hundred sixty-five".