420166 has 8 divisors (see below), whose sum is σ = 663480. Its totient is φ = 199008.

The previous prime is 420163. The next prime is 420191. The reversal of 420166 is 661024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420163) 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, 5491 + ... + 5566.

It is an arithmetic number, because the mean of its divisors is an integer number (82935).

2⁴²⁰¹⁶⁶ is an apocalyptic number.

420166 is a deficient number, since it is larger than the sum of its proper divisors (243314).

420166 is a wasteful number, since it uses less digits than its factorization.

420166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 420166 is about 648.2021289690. The cubic root of 420166 is about 74.8985888648.

The spelling of 420166 in words is "four hundred twenty thousand, one hundred sixty-six".