1166563 has 2 divisors, whose sum is σ = 1166564. Its totient is φ = 1166562.

The previous prime is 1166549. The next prime is 1166567. The reversal of 1166563 is 3656611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1166563 - 2⁵ = 1166531 is a prime.

1166563 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1166567) 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, 583281 + 583282.

It is an arithmetic number, because the mean of its divisors is an integer number (583282).

2^1166563 is an apocalyptic number.

1166563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166563 is an equidigital number, since it uses as much as digits as its factorization.

1166563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 1166563 is about 1080.0754603267. The cubic root of 1166563 is about 105.2695417927.

The spelling of 1166563 in words is "one million, one hundred sixty-six thousand, five hundred sixty-three".