2166012 has 18 divisors (see below), whose sum is σ = 5475288. Its totient is φ = 721992.

The previous prime is 2166007. The next prime is 2166023. The reversal of 2166012 is 2106612.

It is a happy number.

2166012 is a `hidden beast` number, since 2 + 1 + 660 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 30048 + ... + 30119.

2^2166012 is an apocalyptic number.

It is an amenable number.

2166012 is an abundant number, since it is smaller than the sum of its proper divisors (3309276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166012 is a wasteful number, since it uses less digits than its factorization.

2166012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60177 (or 60172 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2166012 is about 1471.7377483777. The cubic root of 2166012 is about 129.3859005028.

The spelling of 2166012 in words is "two million, one hundred sixty-six thousand, twelve".