1159471165 has 4 divisors (see below), whose sum is σ = 1391365404. Its totient is φ = 927576928.

The previous prime is 1159471151. The next prime is 1159471169. The reversal of 1159471165 is 5611749511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5611749511 = 2417 ⋅2321783.

It can be written as a sum of positive squares in 2 ways, for example, as 547700409 + 611770756 = 23403^2 + 24734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1159471165 - 2⁷ = 1159471037 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159471169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115947112 + ... + 115947121.

It is an arithmetic number, because the mean of its divisors is an integer number (347841351).

Almost surely, 2^1159471165 is an apocalyptic number.

It is an amenable number.

1159471165 is a deficient number, since it is larger than the sum of its proper divisors (231894239).

1159471165 is an equidigital number, since it uses as much as digits as its factorization.

1159471165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231894238.

The product of its digits is 37800, while the sum is 40.

The square root of 1159471165 is about 34051.0082816941. The cubic root of 1159471165 is about 1050.5578788981.

The spelling of 1159471165 in words is "one billion, one hundred fifty-nine million, four hundred seventy-one thousand, one hundred sixty-five".