1158299561 has 2 divisors, whose sum is σ = 1158299562. Its totient is φ = 1158299560.

The previous prime is 1158299543. The next prime is 1158299579. The reversal of 1158299561 is 1659928511.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1158299543) and next prime (1158299579).

It can be written as a sum of positive squares in only one way, i.e., 771783961 + 386515600 = 27781^2 + 19660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158299561 - 2⁶ = 1158299497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1158290561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579149780 + 579149781.

It is an arithmetic number, because the mean of its divisors is an integer number (579149781).

Almost surely, 2^1158299561 is an apocalyptic number.

It is an amenable number.

1158299561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158299561 is an equidigital number, since it uses as much as digits as its factorization.

1158299561 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 1158299561 is about 34033.8002726701. The cubic root of 1158299561 is about 1050.2039093024.

The spelling of 1158299561 in words is "one billion, one hundred fifty-eight million, two hundred ninety-nine thousand, five hundred sixty-one".