422805 has 16 divisors (see below), whose sum is σ = 687744. Its totient is φ = 221760.

The previous prime is 422803. The next prime is 422827. The reversal of 422805 is 508224.

It is not a de Polignac number, because 422805 - 2¹ = 422803 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422803) 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 15 ways as a sum of consecutive naturals, for example, 867 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (42984).

2⁴²²⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

422805 is a deficient number, since it is larger than the sum of its proper divisors (264939).

422805 is a wasteful number, since it uses less digits than its factorization.

422805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 422805 is about 650.2345730581. The cubic root of 422805 is about 75.0550706642.

The spelling of 422805 in words is "four hundred twenty-two thousand, eight hundred five".