422591 has 4 divisors (see below), whose sum is σ = 455112. Its totient is φ = 390072.

The previous prime is 422581. The next prime is 422621. The reversal of 422591 is 195224.

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 422591 - 2¹⁴ = 406207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 422591.

It is not an unprimeable number, because it can be changed into a prime (422551) 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, 16241 + ... + 16266.

It is an arithmetic number, because the mean of its divisors is an integer number (113778).

2⁴²²⁵⁹¹ is an apocalyptic number.

422591 is a deficient number, since it is larger than the sum of its proper divisors (32521).

422591 is a wasteful number, since it uses less digits than its factorization.

422591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32520.

The product of its digits is 720, while the sum is 23.

The square root of 422591 is about 650.0699962312. The cubic root of 422591 is about 75.0424056486.

The spelling of 422591 in words is "four hundred twenty-two thousand, five hundred ninety-one".