1140345581 has 2 divisors, whose sum is σ = 1140345582. Its totient is φ = 1140345580.

The previous prime is 1140345527. The next prime is 1140345599. The reversal of 1140345581 is 1855430411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848789956 + 291555625 = 29134^2 + 17075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140345581 - 2⁶ = 1140345517 is a prime.

It is a super-2 number, since 2×1140345581² = 2600776088212455122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1140345181) 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 as a sum of consecutive naturals, namely, 570172790 + 570172791.

It is an arithmetic number, because the mean of its divisors is an integer number (570172791).

Almost surely, 2^1140345581 is an apocalyptic number.

It is an amenable number.

1140345581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140345581 is an equidigital number, since it uses as much as digits as its factorization.

1140345581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1140345581 is about 33769.0032574253. The cubic root of 1140345581 is about 1044.7494743721.

Adding to 1140345581 its reverse (1855430411), we get a palindrome (2995775992).

The spelling of 1140345581 in words is "one billion, one hundred forty million, three hundred forty-five thousand, five hundred eighty-one".