421966 has 12 divisors (see below), whose sum is σ = 656208. Its totient is φ = 203412.

The previous prime is 421943. The next prime is 421973. The reversal of 421966 is 669124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6265 + ... + 6331.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

421966 is a Friedman number, since it can be written as 94*(61+6)^2, using all its digits and the basic arithmetic operations.

2⁴²¹⁹⁶⁶ is an apocalyptic number.

421966 is a deficient number, since it is larger than the sum of its proper divisors (234242).

421966 is an equidigital number, since it uses as much as digits as its factorization.

421966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 116 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 421966 is about 649.5891008938. The cubic root of 421966 is about 75.0053922049.

The spelling of 421966 in words is "four hundred twenty-one thousand, nine hundred sixty-six".