242747 has 2 divisors, whose sum is σ = 242748. Its totient is φ = 242746.

The previous prime is 242731. The next prime is 242773. The reversal of 242747 is 747242.

242747 is nontrivially palindromic in base 12.

It is an a-pointer prime, because the next prime (242773) can be obtained adding 242747 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242747 - 2⁴ = 242731 is a prime.

It is a super-2 number, since 2×242747² = 117852212018, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 242747.

It is not a weakly prime, because it can be changed into another prime (242797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121373 + 121374.

It is an arithmetic number, because the mean of its divisors is an integer number (121374).

2²⁴²⁷⁴⁷ is an apocalyptic number.

242747 is a deficient number, since it is larger than the sum of its proper divisors (1).

242747 is an equidigital number, since it uses as much as digits as its factorization.

242747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 26.

The square root of 242747 is about 492.6936167640. The cubic root of 242747 is about 62.3808503314.

Adding to 242747 its reverse (747242), we get a palindrome (989989).

It can be divided in two parts, 242 and 747, that added together give a palindrome (989).

The spelling of 242747 in words is "two hundred forty-two thousand, seven hundred forty-seven", and thus it is an iban number.