242503 has 4 divisors (see below), whose sum is σ = 243648. Its totient is φ = 241360.

The previous prime is 242491. The next prime is 242509. The reversal of 242503 is 305242.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 242503 - 2¹⁷ = 111431 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242509) 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 in 3 ways as a sum of consecutive naturals, for example, 151 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (60912).

2²⁴²⁵⁰³ is an apocalyptic number.

242503 is a deficient number, since it is larger than the sum of its proper divisors (1145).

242503 is an equidigital number, since it uses as much as digits as its factorization.

242503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 242503 is about 492.4459361189. The cubic root of 242503 is about 62.3599423762.

Adding to 242503 its reverse (305242), we get a palindrome (547745).

The spelling of 242503 in words is "two hundred forty-two thousand, five hundred three".