242740321 has 8 divisors (see below), whose sum is σ = 254263680. Its totient is φ = 231297792.

The previous prime is 242740301. The next prime is 242740327. The reversal of 242740321 is 123047242.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242740321 - 2⁷ = 242740193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242740327) 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, 14016 + ... + 26113.

It is an arithmetic number, because the mean of its divisors is an integer number (31782960).

Almost surely, 2^242740321 is an apocalyptic number.

It is an amenable number.

242740321 is a deficient number, since it is larger than the sum of its proper divisors (11523359).

242740321 is a wasteful number, since it uses less digits than its factorization.

242740321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40415.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 242740321 is about 15580.1258338949. The cubic root of 242740321 is about 623.8027820550.

Adding to 242740321 its reverse (123047242), we get a palindrome (365787563).

The spelling of 242740321 in words is "two hundred forty-two million, seven hundred forty thousand, three hundred twenty-one".