422187 has 4 divisors (see below), whose sum is σ = 562920. Its totient is φ = 281456.

The previous prime is 422183. The next prime is 422203. The reversal of 422187 is 781224.

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 422187 - 2² = 422183 is a prime.

It is an Ulam number.

It is a D-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, 70362 + ... + 70367.

It is an arithmetic number, because the mean of its divisors is an integer number (140730).

2⁴²²¹⁸⁷ is an apocalyptic number.

422187 is a deficient number, since it is larger than the sum of its proper divisors (140733).

422187 is a wasteful number, since it uses less digits than its factorization.

422187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140732.

The product of its digits is 896, while the sum is 24.

The square root of 422187 is about 649.7591861605. The cubic root of 422187 is about 75.0184843329.

The spelling of 422187 in words is "four hundred twenty-two thousand, one hundred eighty-seven".