240247243 has 2 divisors, whose sum is σ = 240247244. Its totient is φ = 240247242.

The previous prime is 240247237. The next prime is 240247261. The reversal of 240247243 is 342742042.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240247243 is a prime.

It is equal to p_13174453 and since 240247243 and 13174453 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (240247283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120123621 + 120123622.

It is an arithmetic number, because the mean of its divisors is an integer number (120123622).

Almost surely, 2^240247243 is an apocalyptic number.

240247243 is a deficient number, since it is larger than the sum of its proper divisors (1).

240247243 is an equidigital number, since it uses as much as digits as its factorization.

240247243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 240247243 is about 15499.9110642610. The cubic root of 240247243 is about 621.6598283654.

Adding to 240247243 its reverse (342742042), we get a palindrome (582989285).

The spelling of 240247243 in words is "two hundred forty million, two hundred forty-seven thousand, two hundred forty-three".