12420166 has 24 divisors (see below), whose sum is σ = 21689640. Its totient is φ = 5311680.

The previous prime is 12420151. The next prime is 12420211. The reversal of 12420166 is 66102421.

12420166 = 159² + 160² + ... + 345².

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2605 + ... + 5623.

It is an arithmetic number, because the mean of its divisors is an integer number (903735).

Almost surely, 2^12420166 is an apocalyptic number.

12420166 is a deficient number, since it is larger than the sum of its proper divisors (9269474).

12420166 is a wasteful number, since it uses less digits than its factorization.

12420166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3049 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12420166 is about 3524.2255886932. The cubic root of 12420166 is about 231.5843106214.

Adding to 12420166 its reverse (66102421), we get a palindrome (78522587).

The spelling of 12420166 in words is "twelve million, four hundred twenty thousand, one hundred sixty-six".