1140621165 has 24 divisors (see below), whose sum is σ = 1983847320. Its totient is φ = 606248064.

The previous prime is 1140621151. The next prime is 1140621173. The reversal of 1140621165 is 5611260411.

It can be written as a sum of positive squares in 4 ways, for example, as 220166244 + 920454921 = 14838^2 + 30339^2 .

It is not a de Polignac number, because 1140621165 - 2⁴ = 1140621149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30070 + ... + 56439.

It is an arithmetic number, because the mean of its divisors is an integer number (82660305).

Almost surely, 2^1140621165 is an apocalyptic number.

1140621165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1140621165 is a deficient number, since it is larger than the sum of its proper divisors (843226155).

1140621165 is a wasteful number, since it uses less digits than its factorization.

1140621165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86813 (or 86810 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1140621165 is about 33773.0834393308. The cubic root of 1140621165 is about 1044.8336281157.

Adding to 1140621165 its reverse (5611260411), we get a palindrome (6751881576).

The spelling of 1140621165 in words is "one billion, one hundred forty million, six hundred twenty-one thousand, one hundred sixty-five".