242443123 has 4 divisors (see below), whose sum is σ = 261092608. Its totient is φ = 223793640.

The previous prime is 242443109. The next prime is 242443163. The reversal of 242443123 is 321344242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321344242 = 2 ⋅160672121.

It is a cyclic number.

It is not a de Polignac number, because 242443123 - 2²¹ = 240345971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242443163) 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 3 ways as a sum of consecutive naturals, for example, 9324723 + ... + 9324748.

It is an arithmetic number, because the mean of its divisors is an integer number (65273152).

Almost surely, 2^242443123 is an apocalyptic number.

242443123 is a deficient number, since it is larger than the sum of its proper divisors (18649485).

242443123 is a wasteful number, since it uses less digits than its factorization.

242443123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18649484.

The product of its digits is 4608, while the sum is 25.

The square root of 242443123 is about 15570.5851848927. The cubic root of 242443123 is about 623.5480947255.

Adding to 242443123 its reverse (321344242), we get a palindrome (563787365).

The spelling of 242443123 in words is "two hundred forty-two million, four hundred forty-three thousand, one hundred twenty-three".