2166275 has 12 divisors (see below), whose sum is σ = 2725272. Its totient is φ = 1707840.

The previous prime is 2166251. The next prime is 2166289. The reversal of 2166275 is 5726612.

It is a de Polignac number, because none of the positive numbers 2^k-2166275 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1232 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (227106).

2^2166275 is an apocalyptic number.

2166275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2166275 is a deficient number, since it is larger than the sum of its proper divisors (558997).

2166275 is a wasteful number, since it uses less digits than its factorization.

2166275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1265 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 2166275 is about 1471.8270958234. The cubic root of 2166275 is about 129.3911370258.

The spelling of 2166275 in words is "two million, one hundred sixty-six thousand, two hundred seventy-five".