242145505289 has 2 divisors, whose sum is σ = 242145505290. Its totient is φ = 242145505288.

The previous prime is 242145505279. The next prime is 242145505361. The reversal of 242145505289 is 982505541242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242142726400 + 2778889 = 492080^2 + 1667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242145505289 is a prime.

It is not a weakly prime, because it can be changed into another prime (242145505249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121072752644 + 121072752645.

It is an arithmetic number, because the mean of its divisors is an integer number (121072752645).

Almost surely, 2^242145505289 is an apocalyptic number.

It is an amenable number.

242145505289 is a deficient number, since it is larger than the sum of its proper divisors (1).

242145505289 is an equidigital number, since it uses as much as digits as its factorization.

242145505289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 242145505289 in words is "two hundred forty-two billion, one hundred forty-five million, five hundred five thousand, two hundred eighty-nine".