422641 has 4 divisors (see below), whose sum is σ = 424512. Its totient is φ = 420772.

The previous prime is 422627. The next prime is 422657. The reversal of 422641 is 146224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 422641 - 2⁹ = 422129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422621) 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 3 ways as a sum of consecutive naturals, for example, 541 + ... + 1066.

It is an arithmetic number, because the mean of its divisors is an integer number (106128).

2⁴²²⁶⁴¹ is an apocalyptic number.

It is an amenable number.

422641 is a deficient number, since it is larger than the sum of its proper divisors (1871).

422641 is a wasteful number, since it uses less digits than its factorization.

422641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870.

The product of its digits is 384, while the sum is 19.

The square root of 422641 is about 650.1084524908. The cubic root of 422641 is about 75.0453651471.

Adding to 422641 its reverse (146224), we get a palindrome (568865).

The spelling of 422641 in words is "four hundred twenty-two thousand, six hundred forty-one".