242642503 has 2 divisors, whose sum is σ = 242642504. Its totient is φ = 242642502.

The previous prime is 242642473. The next prime is 242642531. The reversal of 242642503 is 305246242.

It is an a-pointer prime, because the next prime (242642531) can be obtained adding 242642503 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242642503 - 2¹³ = 242634311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242642563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121321251 + 121321252.

It is an arithmetic number, because the mean of its divisors is an integer number (121321252).

Almost surely, 2^242642503 is an apocalyptic number.

242642503 is a deficient number, since it is larger than the sum of its proper divisors (1).

242642503 is an equidigital number, since it uses as much as digits as its factorization.

242642503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 242642503 is about 15576.9863259875. The cubic root of 242642503 is about 623.7189787291.

Adding to 242642503 its reverse (305246242), we get a palindrome (547888745).

The spelling of 242642503 in words is "two hundred forty-two million, six hundred forty-two thousand, five hundred three".