1159289561 has 2 divisors, whose sum is σ = 1159289562. Its totient is φ = 1159289560.

The previous prime is 1159289533. The next prime is 1159289591. The reversal of 1159289561 is 1659829511.

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., 703893961 + 455395600 = 26531^2 + 21340^2 .

It is an emirp because it is prime and its reverse (1659829511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1159289561 - 2¹⁴ = 1159273177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1159289591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579644780 + 579644781.

It is an arithmetic number, because the mean of its divisors is an integer number (579644781).

Almost surely, 2^1159289561 is an apocalyptic number.

It is an amenable number.

1159289561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159289561 is an equidigital number, since it uses as much as digits as its factorization.

1159289561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 47.

The square root of 1159289561 is about 34048.3415308294. The cubic root of 1159289561 is about 1050.5030276060.

The spelling of 1159289561 in words is "one billion, one hundred fifty-nine million, two hundred eighty-nine thousand, five hundred sixty-one".