423166 has 4 divisors (see below), whose sum is σ = 634752. Its totient is φ = 211582.

The previous prime is 423133. The next prime is 423173. The reversal of 423166 is 661324.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

423166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 105790 + ... + 105793.

It is an arithmetic number, because the mean of its divisors is an integer number (158688).

2⁴²³¹⁶⁶ is an apocalyptic number.

423166 is a deficient number, since it is larger than the sum of its proper divisors (211586).

423166 is a wasteful number, since it uses less digits than its factorization.

423166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211585.

The product of its digits is 864, while the sum is 22.

The square root of 423166 is about 650.5121059596. The cubic root of 423166 is about 75.0764257985.

The spelling of 423166 in words is "four hundred twenty-three thousand, one hundred sixty-six".