240423 has 4 divisors (see below), whose sum is σ = 320568. Its totient is φ = 160280.

The previous prime is 240421. The next prime is 240433. The reversal of 240423 is 324042.

It is a happy number.

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 240423 - 2¹ = 240421 is a prime.

It is a D-number.

240423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240421) 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, 40068 + ... + 40073.

It is an arithmetic number, because the mean of its divisors is an integer number (80142).

2²⁴⁰⁴²³ is an apocalyptic number.

240423 is a deficient number, since it is larger than the sum of its proper divisors (80145).

240423 is an equidigital number, since it uses as much as digits as its factorization.

240423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80144.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 240423 is about 490.3294810635. The cubic root of 240423 is about 62.1811386724.

Adding to 240423 its reverse (324042), we get a palindrome (564465).

The spelling of 240423 in words is "two hundred forty thousand, four hundred twenty-three", and thus it is an iban number.