240561001 has 2 divisors, whose sum is σ = 240561002. Its totient is φ = 240561000.

The previous prime is 240560989. The next prime is 240561007. The reversal of 240561001 is 100165042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234824976 + 5736025 = 15324^2 + 2395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240561001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240561001.

It is not a weakly prime, because it can be changed into another prime (240561007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120280500 + 120280501.

It is an arithmetic number, because the mean of its divisors is an integer number (120280501).

Almost surely, 2^240561001 is an apocalyptic number.

It is an amenable number.

240561001 is a deficient number, since it is larger than the sum of its proper divisors (1).

240561001 is an equidigital number, since it uses as much as digits as its factorization.

240561001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 240561001 is about 15510.0290457497. The cubic root of 240561001 is about 621.9303356600.

The spelling of 240561001 in words is "two hundred forty million, five hundred sixty-one thousand, one".