242321 has 4 divisors (see below), whose sum is σ = 243312. Its totient is φ = 241332.

The previous prime is 242309. The next prime is 242329. The reversal of 242321 is 123242.

242321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 242321 - 2⁶ = 242257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242296 and 242305.

It is not an unprimeable number, because it can be changed into a prime (242329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (60828).

2²⁴²³²¹ is an apocalyptic number.

It is an amenable number.

242321 is a deficient number, since it is larger than the sum of its proper divisors (991).

242321 is an equidigital number, since it uses as much as digits as its factorization.

242321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

The product of its digits is 96, while the sum is 14.

The square root of 242321 is about 492.2611095750. The cubic root of 242321 is about 62.3443379645.

Adding to 242321 its reverse (123242), we get a palindrome (365563).

The spelling of 242321 in words is "two hundred forty-two thousand, three hundred twenty-one", and thus it is an iban number.