12166942 has 16 divisors (see below), whose sum is σ = 18929664. Its totient is φ = 5859000.

The previous prime is 12166939. The next prime is 12166949. The reversal of 12166942 is 24966121.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18967 + ... + 19597.

It is an arithmetic number, because the mean of its divisors is an integer number (1183104).

It is a vampire number, since it can be written as 1262 ⋅ 9641 (with its own digits).

Almost surely, 2^12166942 is an apocalyptic number.

12166942 is a deficient number, since it is larger than the sum of its proper divisors (6762722).

12166942 is a wasteful number, since it uses less digits than its factorization.

12166942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975.

The product of its digits is 5184, while the sum is 31.

The square root of 12166942 is about 3488.1143903261. The cubic root of 12166942 is about 229.9996345300. Note that the first 3 decimals are identical.

The spelling of 12166942 in words is "twelve million, one hundred sixty-six thousand, nine hundred forty-two".