242647 has 2 divisors, whose sum is σ = 242648. Its totient is φ = 242646.

The previous prime is 242639. The next prime is 242659. The reversal of 242647 is 746242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242647 - 2³ = 242639 is a prime.

242647 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242617) 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, 121323 + 121324.

It is an arithmetic number, because the mean of its divisors is an integer number (121324).

2²⁴²⁶⁴⁷ is an apocalyptic number.

242647 is a deficient number, since it is larger than the sum of its proper divisors (1).

242647 is an equidigital number, since it uses as much as digits as its factorization.

242647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 25.

The square root of 242647 is about 492.5921233637. The cubic root of 242647 is about 62.3722831924.

Adding to 242647 its reverse (746242), we get a palindrome (988889).

The spelling of 242647 in words is "two hundred forty-two thousand, six hundred forty-seven".