1167271065 has 12 divisors (see below), whose sum is σ = 2023269924. Its totient is φ = 622544544.

The previous prime is 1167271043. The next prime is 1167271069. The reversal of 1167271065 is 5601727611.

It can be written as a sum of positive squares in 2 ways, for example, as 516561984 + 650709081 = 22728^2 + 25509^2 .

It is not a de Polignac number, because 1167271065 - 2⁵ = 1167271033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1167271069) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12969634 + ... + 12969723.

It is an arithmetic number, because the mean of its divisors is an integer number (168605827).

Almost surely, 2^1167271065 is an apocalyptic number.

1167271065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1167271065 is a deficient number, since it is larger than the sum of its proper divisors (855998859).

1167271065 is a wasteful number, since it uses less digits than its factorization.

1167271065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25939368 (or 25939365 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1167271065 is about 34165.3488932866. The cubic root of 1167271065 is about 1052.9083585694.

Adding to 1167271065 its reverse (5601727611), we get a palindrome (6768998676).

The spelling of 1167271065 in words is "one billion, one hundred sixty-seven million, two hundred seventy-one thousand, sixty-five".