42423423 has 32 divisors (see below), whose sum is σ = 67415040. Its totient is φ = 23224320.

The previous prime is 42423421. The next prime is 42423443. The reversal of 42423423 is 32432424.

It is not a de Polignac number, because 42423423 - 2¹ = 42423421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42423393 and 42423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42423421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54783 + ... + 55551.

It is an arithmetic number, because the mean of its divisors is an integer number (2106720).

Almost surely, 2^42423423 is an apocalyptic number.

42423423 is a deficient number, since it is larger than the sum of its proper divisors (24991617).

42423423 is a wasteful number, since it uses less digits than its factorization.

42423423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its digits is 4608, while the sum is 24.

The square root of 42423423 is about 6513.3265694267. The cubic root of 42423423 is about 348.7668796188.

Adding to 42423423 its reverse (32432424), we get a palindrome (74855847).

Subtracting from 42423423 its reverse (32432424), we obtain a palindrome (9990999).

The spelling of 42423423 in words is "forty-two million, four hundred twenty-three thousand, four hundred twenty-three".