1166165 has 32 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 668160.

The previous prime is 1166153. The next prime is 1166213. The reversal of 1166165 is 5616611.

It is not a de Polignac number, because 1166165 - 2⁶ = 1166101 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 31 ways as a sum of consecutive naturals, for example, 4889 + ... + 5121.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2^1166165 is an apocalyptic number.

It is an amenable number.

1166165 is a deficient number, since it is larger than the sum of its proper divisors (720811).

1166165 is a wasteful number, since it uses less digits than its factorization.

1166165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269.

The product of its digits is 1080, while the sum is 26.

The square root of 1166165 is about 1079.8911982232. The cubic root of 1166165 is about 105.2575687164.

It can be divided in two parts, 1166 and 165, that added together give a palindrome (1331).

The spelling of 1166165 in words is "one million, one hundred sixty-six thousand, one hundred sixty-five".