1166809 has 16 divisors (see below), whose sum is σ = 1454080. Its totient is φ = 913680.

The previous prime is 1166807. The next prime is 1166827. The reversal of 1166809 is 9086611.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1166809 - 2¹ = 1166807 is a prime.

It is a super-2 number, since 2×1166809² = 2722886484962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3982 + ... + 4264.

It is an arithmetic number, because the mean of its divisors is an integer number (90880).

2^1166809 is an apocalyptic number.

1166809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1166809 is a deficient number, since it is larger than the sum of its proper divisors (287271).

1166809 is a wasteful number, since it uses less digits than its factorization.

1166809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1166809 is about 1080.1893352556. The cubic root of 1166809 is about 105.2769408750.

The spelling of 1166809 in words is "one million, one hundred sixty-six thousand, eight hundred nine".