240375721 has 2 divisors, whose sum is σ = 240375722. Its totient is φ = 240375720.

The previous prime is 240375713. The next prime is 240375727. The reversal of 240375721 is 127573042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214212496 + 26163225 = 14636^2 + 5115^2 .

It is a cyclic number.

It is not a de Polignac number, because 240375721 - 2³ = 240375713 is a prime.

It is not a weakly prime, because it can be changed into another prime (240375727) 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, 120187860 + 120187861.

It is an arithmetic number, because the mean of its divisors is an integer number (120187861).

Almost surely, 2^240375721 is an apocalyptic number.

It is an amenable number.

240375721 is a deficient number, since it is larger than the sum of its proper divisors (1).

240375721 is an equidigital number, since it uses as much as digits as its factorization.

240375721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 240375721 is about 15504.0549857126. The cubic root of 240375721 is about 621.7706244731.

The spelling of 240375721 in words is "two hundred forty million, three hundred seventy-five thousand, seven hundred twenty-one".