242520305 has 16 divisors (see below), whose sum is σ = 294067200. Its totient is φ = 191999808.

The previous prime is 242520253. The next prime is 242520319. The reversal of 242520305 is 503025242.

242520305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 242520305 - 2⁸ = 242520049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221339 + ... + 222431.

It is an arithmetic number, because the mean of its divisors is an integer number (18379200).

Almost surely, 2^242520305 is an apocalyptic number.

It is an amenable number.

242520305 is a deficient number, since it is larger than the sum of its proper divisors (51546895).

242520305 is a wasteful number, since it uses less digits than its factorization.

242520305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 242520305 is about 15573.0634430095. The cubic root of 242520305 is about 623.6142567491.

Adding to 242520305 its reverse (503025242), we get a palindrome (745545547).

The spelling of 242520305 in words is "two hundred forty-two million, five hundred twenty thousand, three hundred five".