1166569 has 2 divisors, whose sum is σ = 1166570. Its totient is φ = 1166568.

The previous prime is 1166567. The next prime is 1166579. The reversal of 1166569 is 9656611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 169 = 1080^2 + 13^2 .

It is an emirp because it is prime and its reverse (9656611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1166569 - 2¹ = 1166567 is a prime.

It is a super-2 number, since 2×1166569² = 2721766463522, which contains 22 as substring.

Together with 1166567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1166563) by changing a digit.

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 as a sum of consecutive naturals, namely, 583284 + 583285.

It is an arithmetic number, because the mean of its divisors is an integer number (583285).

2^1166569 is an apocalyptic number.

It is an amenable number.

1166569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166569 is an equidigital number, since it uses as much as digits as its factorization.

1166569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 1166569 is about 1080.0782379069. The cubic root of 1166569 is about 105.2697222705.

The spelling of 1166569 in words is "one million, one hundred sixty-six thousand, five hundred sixty-nine".