240560861 has 2 divisors, whose sum is σ = 240560862. Its totient is φ = 240560860.

The previous prime is 240560857. The next prime is 240560893. The reversal of 240560861 is 168065042.

It is an a-pointer prime, because the next prime (240560893) can be obtained adding 240560861 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230857636 + 9703225 = 15194^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 240560861 - 2² = 240560857 is a prime.

It is a super-2 number, since 2×240560861² = 115739055690122642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240560261) 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, 120280430 + 120280431.

It is an arithmetic number, because the mean of its divisors is an integer number (120280431).

Almost surely, 2^240560861 is an apocalyptic number.

It is an amenable number.

240560861 is a deficient number, since it is larger than the sum of its proper divisors (1).

240560861 is an equidigital number, since it uses as much as digits as its factorization.

240560861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 240560861 is about 15510.0245325402. The cubic root of 240560861 is about 621.9302150111.

The spelling of 240560861 in words is "two hundred forty million, five hundred sixty thousand, eight hundred sixty-one".