1164021365 has 32 divisors (see below), whose sum is σ = 1631671776. Its totient is φ = 789258240.

The previous prime is 1164021361. The next prime is 1164021371. The reversal of 1164021365 is 5631204611.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 338780836 + 825240529 = 18406^2 + 28727^2 .

It is not a de Polignac number, because 1164021365 - 2² = 1164021361 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 (1164021361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32459 + ... + 58151.

It is an arithmetic number, because the mean of its divisors is an integer number (50989743).

Almost surely, 2^1164021365 is an apocalyptic number.

It is an amenable number.

1164021365 is a deficient number, since it is larger than the sum of its proper divisors (467650411).

1164021365 is a wasteful number, since it uses less digits than its factorization.

1164021365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25769.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1164021365 is about 34117.7573266474. The cubic root of 1164021365 is about 1051.9303462319.

Adding to 1164021365 its reverse (5631204611), we get a palindrome (6795225976).

The spelling of 1164021365 in words is "one billion, one hundred sixty-four million, twenty-one thousand, three hundred sixty-five".