422189 has 4 divisors (see below), whose sum is σ = 435840. Its totient is φ = 408540.

The previous prime is 422183. The next prime is 422203. The reversal of 422189 is 981224.

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 a de Polignac number, because none of the positive numbers 2^k-422189 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6779 + ... + 6840.

It is an arithmetic number, because the mean of its divisors is an integer number (108960).

2⁴²²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

422189 is a deficient number, since it is larger than the sum of its proper divisors (13651).

422189 is a wasteful number, since it uses less digits than its factorization.

422189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13650.

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

The square root of 422189 is about 649.7607251904. The cubic root of 422189 is about 75.0186027928.

The spelling of 422189 in words is "four hundred twenty-two thousand, one hundred eighty-nine".