242440423 has 4 divisors (see below), whose sum is σ = 242783080. Its totient is φ = 242097768.

The previous prime is 242440369. The next prime is 242440459. The reversal of 242440423 is 324044242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242440423 - 2¹³ = 242432231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242440463) 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, 170265 + ... + 171682.

It is an arithmetic number, because the mean of its divisors is an integer number (60695770).

Almost surely, 2^242440423 is an apocalyptic number.

242440423 is a deficient number, since it is larger than the sum of its proper divisors (342657).

242440423 is an equidigital number, since it uses as much as digits as its factorization.

242440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342656.

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 242440423 is about 15570.4984827076. The cubic root of 242440423 is about 623.5457799749.

Adding to 242440423 its reverse (324044242), we get a palindrome (566484665).

The spelling of 242440423 in words is "two hundred forty-two million, four hundred forty thousand, four hundred twenty-three".