1155242239 has 2 divisors, whose sum is σ = 1155242240. Its totient is φ = 1155242238.

The previous prime is 1155242227. The next prime is 1155242251. The reversal of 1155242239 is 9322425511.

It is a balanced prime because it is at equal distance from previous prime (1155242227) and next prime (1155242251).

It is a cyclic number.

It is not a de Polignac number, because 1155242239 - 2²¹ = 1153145087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155242269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577621119 + 577621120.

It is an arithmetic number, because the mean of its divisors is an integer number (577621120).

Almost surely, 2^1155242239 is an apocalyptic number.

1155242239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155242239 is an equidigital number, since it uses as much as digits as its factorization.

1155242239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 1155242239 is about 33988.8546291281. The cubic root of 1155242239 is about 1049.2790936662.

The spelling of 1155242239 in words is "one billion, one hundred fifty-five million, two hundred forty-two thousand, two hundred thirty-nine".