242724281 has 2 divisors, whose sum is σ = 242724282. Its totient is φ = 242724280.

The previous prime is 242724269. The next prime is 242724299. The reversal of 242724281 is 182427242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199939600 + 42784681 = 14140^2 + 6541^2 .

It is a cyclic number.

It is not a de Polignac number, because 242724281 - 2¹⁸ = 242462137 is a prime.

It is a super-2 number, since 2×242724281² = 117830153173933922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (242724211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121362140 + 121362141.

It is an arithmetic number, because the mean of its divisors is an integer number (121362141).

Almost surely, 2^242724281 is an apocalyptic number.

It is an amenable number.

242724281 is a deficient number, since it is larger than the sum of its proper divisors (1).

242724281 is an equidigital number, since it uses as much as digits as its factorization.

242724281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14336, while the sum is 32.

The square root of 242724281 is about 15579.6110670325. The cubic root of 242724281 is about 623.7890416966.

The spelling of 242724281 in words is "two hundred forty-two million, seven hundred twenty-four thousand, two hundred eighty-one".