242542520 has 32 divisors (see below), whose sum is σ = 595332720. Its totient is φ = 88197120.

The previous prime is 242542501. The next prime is 242542523. The reversal of 242542520 is 25245242.

It is a self number, because there is not a number n which added to its sum of digits gives 242542520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242542523) 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 in 7 ways as a sum of consecutive naturals, for example, 275177 + ... + 276056.

Almost surely, 2^242542520 is an apocalyptic number.

242542520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242542520 is an abundant number, since it is smaller than the sum of its proper divisors (352790200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242542520 is a wasteful number, since it uses less digits than its factorization.

242542520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551255 (or 551251 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 242542520 is about 15573.7766774794. The cubic root of 242542520 is about 623.6332973098.

Adding to 242542520 its reverse (25245242), we get a palindrome (267787762).

The spelling of 242542520 in words is "two hundred forty-two million, five hundred forty-two thousand, five hundred twenty".