1155565027 has 2 divisors, whose sum is σ = 1155565028. Its totient is φ = 1155565026.

The previous prime is 1155564967. The next prime is 1155565039. The reversal of 1155565027 is 7205655511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155565027 - 2⁷ = 1155564899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155565097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577782513 + 577782514.

It is an arithmetic number, because the mean of its divisors is an integer number (577782514).

Almost surely, 2^1155565027 is an apocalyptic number.

1155565027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155565027 is an equidigital number, since it uses as much as digits as its factorization.

1155565027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52500, while the sum is 37.

The square root of 1155565027 is about 33993.6027363973. The cubic root of 1155565027 is about 1049.3768114575.

The spelling of 1155565027 in words is "one billion, one hundred fifty-five million, five hundred sixty-five thousand, twenty-seven".