242328257 has 2 divisors, whose sum is σ = 242328258. Its totient is φ = 242328256.

The previous prime is 242328227. The next prime is 242328269. The reversal of 242328257 is 752823242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134189056 + 108139201 = 11584^2 + 10399^2 .

It is a cyclic number.

It is not a de Polignac number, because 242328257 - 2¹⁴ = 242311873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242328227) 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, 121164128 + 121164129.

It is an arithmetic number, because the mean of its divisors is an integer number (121164129).

Almost surely, 2^242328257 is an apocalyptic number.

It is an amenable number.

242328257 is a deficient number, since it is larger than the sum of its proper divisors (1).

242328257 is an equidigital number, since it uses as much as digits as its factorization.

242328257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 35.

The square root of 242328257 is about 15566.8961903136. The cubic root of 242328257 is about 623.4496031850.

The spelling of 242328257 in words is "two hundred forty-two million, three hundred twenty-eight thousand, two hundred fifty-seven".