1155342289 has 2 divisors, whose sum is σ = 1155342290. Its totient is φ = 1155342288.

The previous prime is 1155342277. The next prime is 1155342319. The reversal of 1155342289 is 9822435511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 906491664 + 248850625 = 30108^2 + 15775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155342289 - 2¹³ = 1155334097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155342259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577671144 + 577671145.

It is an arithmetic number, because the mean of its divisors is an integer number (577671145).

Almost surely, 2^1155342289 is an apocalyptic number.

It is an amenable number.

1155342289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155342289 is an equidigital number, since it uses as much as digits as its factorization.

1155342289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 40.

The square root of 1155342289 is about 33990.3264032577. The cubic root of 1155342289 is about 1049.3093838049.

The spelling of 1155342289 in words is "one billion, one hundred fifty-five million, three hundred forty-two thousand, two hundred eighty-nine".