2166170 has 8 divisors (see below), whose sum is σ = 3899124. Its totient is φ = 866464.

The previous prime is 2166167. The next prime is 2166179. The reversal of 2166170 is 716612.

It can be written as a sum of positive squares in 2 ways, for example, as 2093809 + 72361 = 1447^2 + 269^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2166179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108299 + ... + 108318.

2^2166170 is an apocalyptic number.

2166170 is a deficient number, since it is larger than the sum of its proper divisors (1732954).

2166170 is a wasteful number, since it uses less digits than its factorization.

2166170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216624.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2166170 is about 1471.7914254404. The cubic root of 2166170 is about 129.3890464496.

The spelling of 2166170 in words is "two million, one hundred sixty-six thousand, one hundred seventy".