242521207 has 2 divisors, whose sum is σ = 242521208. Its totient is φ = 242521206.

The previous prime is 242521189. The next prime is 242521267. The reversal of 242521207 is 702125242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242521207 - 2²³ = 234132599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242521267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121260603 + 121260604.

It is an arithmetic number, because the mean of its divisors is an integer number (121260604).

Almost surely, 2^242521207 is an apocalyptic number.

242521207 is a deficient number, since it is larger than the sum of its proper divisors (1).

242521207 is an equidigital number, since it uses as much as digits as its factorization.

242521207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 242521207 is about 15573.0924032448. The cubic root of 242521207 is about 623.6150298794.

Adding to 242521207 its reverse (702125242), we get a palindrome (944646449).

It can be divided in two parts, 2425 and 21207, that added together give a palindrome (23632).

The spelling of 242521207 in words is "two hundred forty-two million, five hundred twenty-one thousand, two hundred seven".