1188130865 has 16 divisors (see below), whose sum is σ = 1480764240. Its totient is φ = 914411520.

The previous prime is 1188130859. The next prime is 1188130891. The reversal of 1188130865 is 5680318811.

It can be written as a sum of positive squares in 8 ways, for example, as 56010256 + 1132120609 = 7484^2 + 33647^2 .

It is not a de Polignac number, because 1188130865 - 2¹⁴ = 1188114481 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 19616 + ... + 52545.

It is an arithmetic number, because the mean of its divisors is an integer number (92547765).

Almost surely, 2^1188130865 is an apocalyptic number.

It is an amenable number.

1188130865 is a deficient number, since it is larger than the sum of its proper divisors (292633375).

1188130865 is an equidigital number, since it uses as much as digits as its factorization.

1188130865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72292.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 1188130865 is about 34469.2742163220. The cubic root of 1188130865 is about 1059.1433879776.

The spelling of 1188130865 in words is "one billion, one hundred eighty-eight million, one hundred thirty thousand, eight hundred sixty-five".