242345309 has 16 divisors (see below), whose sum is σ = 253108800. Its totient is φ = 231893376.

The previous prime is 242345297. The next prime is 242345329. The reversal of 242345309 is 903543242.

It is a cyclic number.

It is not a de Polignac number, because 242345309 - 2⁴ = 242345293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242345329) 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 15 ways as a sum of consecutive naturals, for example, 391202 + ... + 391820.

It is an arithmetic number, because the mean of its divisors is an integer number (15819300).

Almost surely, 2^242345309 is an apocalyptic number.

It is an amenable number.

242345309 is a deficient number, since it is larger than the sum of its proper divisors (10763491).

242345309 is an equidigital number, since it uses as much as digits as its factorization.

242345309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 242345309 is about 15567.4438813827. The cubic root of 242345309 is about 623.4642263432.

The spelling of 242345309 in words is "two hundred forty-two million, three hundred forty-five thousand, three hundred nine".