422891 has 4 divisors (see below), whose sum is σ = 483312. Its totient is φ = 362472.

The previous prime is 422881. The next prime is 422893. The reversal of 422891 is 198224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 422891 - 2⁶ = 422827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 422891.

It is not an unprimeable number, because it can be changed into a prime (422893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30200 + ... + 30213.

It is an arithmetic number, because the mean of its divisors is an integer number (120828).

2⁴²²⁸⁹¹ is an apocalyptic number.

422891 is a deficient number, since it is larger than the sum of its proper divisors (60421).

422891 is an equidigital number, since it uses as much as digits as its factorization.

422891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60420.

The product of its digits is 1152, while the sum is 26.

The square root of 422891 is about 650.3006996767. The cubic root of 422891 is about 75.0601591395.

The spelling of 422891 in words is "four hundred twenty-two thousand, eight hundred ninety-one".