1155545239 has 2 divisors, whose sum is σ = 1155545240. Its totient is φ = 1155545238.

The previous prime is 1155545227. The next prime is 1155545257. The reversal of 1155545239 is 9325455511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1155545239 - 2⁹ = 1155544727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155545219) 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, 577772619 + 577772620.

It is an arithmetic number, because the mean of its divisors is an integer number (577772620).

Almost surely, 2^1155545239 is an apocalyptic number.

1155545239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155545239 is an equidigital number, since it uses as much as digits as its factorization.

1155545239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135000, while the sum is 40.

The square root of 1155545239 is about 33993.3116803880. The cubic root of 1155545239 is about 1049.3708215488.

The spelling of 1155545239 in words is "one billion, one hundred fifty-five million, five hundred forty-five thousand, two hundred thirty-nine".