1311127165 has 16 divisors (see below), whose sum is σ = 1585591488. Its totient is φ = 1040772096.

The previous prime is 1311127163. The next prime is 1311127171. The reversal of 1311127165 is 5617211131.

It is a cyclic number.

It is not a de Polignac number, because 1311127165 - 2¹ = 1311127163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311127163) 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 in 15 ways as a sum of consecutive naturals, for example, 425962 + ... + 429028.

It is an arithmetic number, because the mean of its divisors is an integer number (99099468).

Almost surely, 2^1311127165 is an apocalyptic number.

It is an amenable number.

1311127165 is a deficient number, since it is larger than the sum of its proper divisors (274464323).

1311127165 is a wasteful number, since it uses less digits than its factorization.

1311127165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3708.

The product of its digits is 1260, while the sum is 28.

The square root of 1311127165 is about 36209.4899853616. The cubic root of 1311127165 is about 1094.4979148371.

Adding to 1311127165 its reverse (5617211131), we get a palindrome (6928338296).

The spelling of 1311127165 in words is "one billion, three hundred eleven million, one hundred twenty-seven thousand, one hundred sixty-five".