2166494 has 32 divisors (see below), whose sum is σ = 3836160. Its totient is φ = 907200.

The previous prime is 2166467. The next prime is 2166509. The reversal of 2166494 is 4946612.

It is a happy number.

2166494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166494.

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 15 ways as a sum of consecutive naturals, for example, 29642 + ... + 29714.

It is an arithmetic number, because the mean of its divisors is an integer number (119880).

2^2166494 is an apocalyptic number.

2166494 is a deficient number, since it is larger than the sum of its proper divisors (1669666).

2166494 is a wasteful number, since it uses less digits than its factorization.

2166494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its digits is 10368, while the sum is 32.

The square root of 2166494 is about 1471.9014912690. The cubic root of 2166494 is about 129.3954971531.

The spelling of 2166494 in words is "two million, one hundred sixty-six thousand, four hundred ninety-four".