1166823 has 12 divisors (see below), whose sum is σ = 1926288. Its totient is φ = 666720.

The previous prime is 1166807. The next prime is 1166827. The reversal of 1166823 is 3286611.

It is not a de Polignac number, because 1166823 - 2⁴ = 1166807 is a prime.

It is a super-2 number, since 2×1166823² = 2722951826658, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9198 + ... + 9323.

It is an arithmetic number, because the mean of its divisors is an integer number (160524).

2^1166823 is an apocalyptic number.

1166823 is a deficient number, since it is larger than the sum of its proper divisors (759465).

1166823 is a wasteful number, since it uses less digits than its factorization.

1166823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18534 (or 18531 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1166823 is about 1080.1958155816. The cubic root of 1166823 is about 105.2773619297.

The spelling of 1166823 in words is "one million, one hundred sixty-six thousand, eight hundred twenty-three".