1166791 has 4 divisors (see below), whose sum is σ = 1169784. Its totient is φ = 1163800.

The previous prime is 1166779. The next prime is 1166801. The reversal of 1166791 is 1976611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1166791 - 2⁷ = 1166663 is a prime.

It is a super-2 number, since 2×1166791² = 2722802475362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166741) 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, 805 + ... + 1726.

It is an arithmetic number, because the mean of its divisors is an integer number (292446).

2^1166791 is an apocalyptic number.

1166791 is a deficient number, since it is larger than the sum of its proper divisors (2993).

1166791 is an equidigital number, since it uses as much as digits as its factorization.

1166791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992.

The product of its digits is 2268, while the sum is 31.

The square root of 1166791 is about 1080.1810033508. The cubic root of 1166791 is about 105.2763995140.

The spelling of 1166791 in words is "one million, one hundred sixty-six thousand, seven hundred ninety-one".