242542739 has 2 divisors, whose sum is σ = 242542740. Its totient is φ = 242542738.

The previous prime is 242542717. The next prime is 242542753. The reversal of 242542739 is 937245242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242542739 - 2⁸ = 242542483 is a prime.

It is not a weakly prime, because it can be changed into another prime (242542789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121271369 + 121271370.

It is an arithmetic number, because the mean of its divisors is an integer number (121271370).

Almost surely, 2^242542739 is an apocalyptic number.

242542739 is a deficient number, since it is larger than the sum of its proper divisors (1).

242542739 is an equidigital number, since it uses as much as digits as its factorization.

242542739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 38.

The square root of 242542739 is about 15573.7837085276. The cubic root of 242542739 is about 623.6334850097.

The spelling of 242542739 in words is "two hundred forty-two million, five hundred forty-two thousand, seven hundred thirty-nine".