240243121 has 2 divisors, whose sum is σ = 240243122. Its totient is φ = 240243120.

The previous prime is 240243097. The next prime is 240243137. The reversal of 240243121 is 121342042.

240243121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122412096 + 117831025 = 11064^2 + 10855^2 .

It is a cyclic number.

It is not a de Polignac number, because 240243121 - 2⁵ = 240243089 is a prime.

It is not a weakly prime, because it can be changed into another prime (240243151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120121560 + 120121561.

It is an arithmetic number, because the mean of its divisors is an integer number (120121561).

Almost surely, 2^240243121 is an apocalyptic number.

It is an amenable number.

240243121 is a deficient number, since it is larger than the sum of its proper divisors (1).

240243121 is an equidigital number, since it uses as much as digits as its factorization.

240243121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 240243121 is about 15499.7780951858. The cubic root of 240243121 is about 621.6562730052.

Adding to 240243121 its reverse (121342042), we get a palindrome (361585163).

The spelling of 240243121 in words is "two hundred forty million, two hundred forty-three thousand, one hundred twenty-one".