1155294289 has 2 divisors, whose sum is σ = 1155294290. Its totient is φ = 1155294288.

The previous prime is 1155294241. The next prime is 1155294323. The reversal of 1155294289 is 9824925511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777963664 + 377330625 = 27892^2 + 19425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155294289 - 2²¹ = 1153197137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155294389) 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, 577647144 + 577647145.

It is an arithmetic number, because the mean of its divisors is an integer number (577647145).

Almost surely, 2^1155294289 is an apocalyptic number.

It is an amenable number.

1155294289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155294289 is an equidigital number, since it uses as much as digits as its factorization.

1155294289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 46.

The square root of 1155294289 is about 33989.6203126778. The cubic root of 1155294289 is about 1049.2948520225.

The spelling of 1155294289 in words is "one billion, one hundred fifty-five million, two hundred ninety-four thousand, two hundred eighty-nine".