1140665321 has 2 divisors, whose sum is σ = 1140665322. Its totient is φ = 1140665320.

The previous prime is 1140665219. The next prime is 1140665327. The reversal of 1140665321 is 1235660411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1039159696 + 101505625 = 32236^2 + 10075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140665321 - 2¹⁸ = 1140403177 is a prime.

It is a super-2 number, since 2×1140665321² = 2602234749064066082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1140665327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570332660 + 570332661.

It is an arithmetic number, because the mean of its divisors is an integer number (570332661).

Almost surely, 2^1140665321 is an apocalyptic number.

It is an amenable number.

1140665321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140665321 is an equidigital number, since it uses as much as digits as its factorization.

1140665321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1140665321 is about 33773.7371488558. The cubic root of 1140665321 is about 1044.8471105583.

The spelling of 1140665321 in words is "one billion, one hundred forty million, six hundred sixty-five thousand, three hundred twenty-one".