4240423 has 4 divisors (see below), whose sum is σ = 4625928. Its totient is φ = 3854920.

The previous prime is 4240421. The next prime is 4240433. The reversal of 4240423 is 3240424.

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 4240423 - 2¹ = 4240421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4240423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240421) 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, 192736 + ... + 192757.

It is an arithmetic number, because the mean of its divisors is an integer number (1156482).

Almost surely, 2^4240423 is an apocalyptic number.

4240423 is a deficient number, since it is larger than the sum of its proper divisors (385505).

4240423 is a wasteful number, since it uses less digits than its factorization.

4240423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385504.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 4240423 is about 2059.2287391157. The cubic root of 4240423 is about 161.8588289029.

Adding to 4240423 its reverse (3240424), we get a palindrome (7480847).

Subtracting from 4240423 its reverse (3240424), we obtain a palindrome (999999).

The spelling of 4240423 in words is "four million, two hundred forty thousand, four hundred twenty-three".