242405539 has 2 divisors, whose sum is σ = 242405540. Its totient is φ = 242405538.

The previous prime is 242405507. The next prime is 242405543. The reversal of 242405539 is 935504242.

242405539 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 is a cyclic number.

It is not a de Polignac number, because 242405539 - 2⁵ = 242405507 is a prime.

It is not a weakly prime, because it can be changed into another prime (242405599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121202769 + 121202770.

It is an arithmetic number, because the mean of its divisors is an integer number (121202770).

Almost surely, 2^242405539 is an apocalyptic number.

242405539 is a deficient number, since it is larger than the sum of its proper divisors (1).

242405539 is an equidigital number, since it uses as much as digits as its factorization.

242405539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 242405539 is about 15569.3782470592. The cubic root of 242405539 is about 623.5158718514.

The spelling of 242405539 in words is "two hundred forty-two million, four hundred five thousand, five hundred thirty-nine".