242123 has 4 divisors (see below), whose sum is σ = 276720. Its totient is φ = 207528.

The previous prime is 242119. The next prime is 242129. The reversal of 242123 is 321242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321242 = 2 ⋅160621.

It is a cyclic number.

It is not a de Polignac number, because 242123 - 2² = 242119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242098 and 242107.

It is not an unprimeable number, because it can be changed into a prime (242129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17288 + ... + 17301.

It is an arithmetic number, because the mean of its divisors is an integer number (69180).

2²⁴²¹²³ is an apocalyptic number.

242123 is a deficient number, since it is larger than the sum of its proper divisors (34597).

242123 is an equidigital number, since it uses as much as digits as its factorization.

242123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34596.

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

The square root of 242123 is about 492.0599556965. The cubic root of 242123 is about 62.3273528599.

Adding to 242123 its reverse (321242), we get a palindrome (563365).

The spelling of 242123 in words is "two hundred forty-two thousand, one hundred twenty-three", and thus it is an iban number.