1155487129 has 2 divisors, whose sum is σ = 1155487130. Its totient is φ = 1155487128.

The previous prime is 1155487117. The next prime is 1155487199. The reversal of 1155487129 is 9217845511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 796763529 + 358723600 = 28227^2 + 18940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155487129 - 2⁷ = 1155487001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155487199) 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, 577743564 + 577743565.

It is an arithmetic number, because the mean of its divisors is an integer number (577743565).

Almost surely, 2^1155487129 is an apocalyptic number.

It is an amenable number.

1155487129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155487129 is an equidigital number, since it uses as much as digits as its factorization.

1155487129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 43.

The square root of 1155487129 is about 33992.4569426807. The cubic root of 1155487129 is about 1049.3532310185.

The spelling of 1155487129 in words is "one billion, one hundred fifty-five million, four hundred eighty-seven thousand, one hundred twenty-nine".