1166999 has 8 divisors (see below), whose sum is σ = 1301040. Its totient is φ = 1040256.

The previous prime is 1166987. The next prime is 1167011. The reversal of 1166999 is 9996611.

1166999 = T₃₆₂ + T₃₆₃ + ... + T₃₇₈.

It is an interprime number because it is at equal distance from previous prime (1166987) and next prime (1167011).

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

It is a cyclic number.

It is not a de Polignac number, because 1166999 - 2²⁰ = 118423 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484 + ... + 2129.

It is an arithmetic number, because the mean of its divisors is an integer number (162630).

2^1166999 is an apocalyptic number.

1166999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1166999 is a deficient number, since it is larger than the sum of its proper divisors (134041).

1166999 is a wasteful number, since it uses less digits than its factorization.

1166999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649.

The product of its digits is 26244, while the sum is 41.

The square root of 1166999 is about 1080.2772792205. The cubic root of 1166999 is about 105.2826549017.

The spelling of 1166999 in words is "one million, one hundred sixty-six thousand, nine hundred ninety-nine".