240234721 has 2 divisors, whose sum is σ = 240234722. Its totient is φ = 240234720.

The previous prime is 240234691. The next prime is 240234733. The reversal of 240234721 is 127432042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175271121 + 64963600 = 13239^2 + 8060^2 .

It is a cyclic number.

It is not a de Polignac number, because 240234721 - 2⁹ = 240234209 is a prime.

It is not a weakly prime, because it can be changed into another prime (240234791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120117360 + 120117361.

It is an arithmetic number, because the mean of its divisors is an integer number (120117361).

Almost surely, 2^240234721 is an apocalyptic number.

It is an amenable number.

240234721 is a deficient number, since it is larger than the sum of its proper divisors (1).

240234721 is an equidigital number, since it uses as much as digits as its factorization.

240234721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 240234721 is about 15499.5071211958. The cubic root of 240234721 is about 621.6490276037.

Adding to 240234721 its reverse (127432042), we get a palindrome (367666763).

The spelling of 240234721 in words is "two hundred forty million, two hundred thirty-four thousand, seven hundred twenty-one".