1140945161 has 2 divisors, whose sum is σ = 1140945162. Its totient is φ = 1140945160.

The previous prime is 1140945149. The next prime is 1140945203. The reversal of 1140945161 is 1615490411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 837523600 + 303421561 = 28940^2 + 17419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1140945161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1140945121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570472580 + 570472581.

It is an arithmetic number, because the mean of its divisors is an integer number (570472581).

Almost surely, 2^1140945161 is an apocalyptic number.

It is an amenable number.

1140945161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140945161 is an equidigital number, since it uses as much as digits as its factorization.

1140945161 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 32.

The square root of 1140945161 is about 33777.8797588007. The cubic root of 1140945161 is about 1044.9325478619.

The spelling of 1140945161 in words is "one billion, one hundred forty million, nine hundred forty-five thousand, one hundred sixty-one".