242440305 has 16 divisors (see below), whose sum is σ = 400418304. Its totient is φ = 125130240.

The previous prime is 242440301. The next prime is 242440343. The reversal of 242440305 is 503044242.

It is not a de Polignac number, because 242440305 - 2² = 242440301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242440301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260224 + ... + 261153.

It is an arithmetic number, because the mean of its divisors is an integer number (25026144).

Almost surely, 2^242440305 is an apocalyptic number.

It is an amenable number.

242440305 is a deficient number, since it is larger than the sum of its proper divisors (157977999).

242440305 is a wasteful number, since it uses less digits than its factorization.

242440305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521416.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 242440305 is about 15570.4946934900. The cubic root of 242440305 is about 623.5456788113.

Adding to 242440305 its reverse (503044242), we get a palindrome (745484547).

The spelling of 242440305 in words is "two hundred forty-two million, four hundred forty thousand, three hundred five".