242217587 has 2 divisors, whose sum is σ = 242217588. Its totient is φ = 242217586.

The previous prime is 242217557. The next prime is 242217653. The reversal of 242217587 is 785712242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242217587 - 2⁶ = 242217523 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242217587.

It is not a weakly prime, because it can be changed into another prime (242217557) 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, 121108793 + 121108794.

It is an arithmetic number, because the mean of its divisors is an integer number (121108794).

Almost surely, 2^242217587 is an apocalyptic number.

242217587 is a deficient number, since it is larger than the sum of its proper divisors (1).

242217587 is an equidigital number, since it uses as much as digits as its factorization.

242217587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 38.

The square root of 242217587 is about 15563.3411258637. The cubic root of 242217587 is about 623.3546800497.

The spelling of 242217587 in words is "two hundred forty-two million, two hundred seventeen thousand, five hundred eighty-seven".