Adding to 242556 its reverse (655242), we get a palindrome (897798).
Subtracting 242556 from its reverse (655242), we obtain a triangular number (412686 = T908).
242556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a nialpdrome in base 13.
It is a congruent number.
242556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2242556 is an apocalyptic number.
242556 is the 696-th triangular number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 242556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317520).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
242556 is a wasteful number, since it uses less digits than its factorization.
242556 is an evil number, because the sum of its binary digits is even.
The square root of 242556 is about 492.4997461928. The cubic root of 242556 is about 62.3644850502.
The spelling of 242556 in words is "two hundred forty-two thousand, five hundred fifty-six".