42423 has 8 divisors (see below), whose sum is σ = 57600. Its totient is φ = 27768.

The previous prime is 42409. The next prime is 42433. The reversal of 42423 is 32424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42423 - 2⁴ = 42407 is a prime.

It is a plaindrome in base 8.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42423.

It is not an unprimeable number, because it can be changed into a prime (42403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148 + ... + 326.

It is an arithmetic number, because the mean of its divisors is an integer number (7200).

2⁴²⁴²³ is an apocalyptic number.

42423 is a deficient number, since it is larger than the sum of its proper divisors (15177).

42423 is a wasteful number, since it uses less digits than its factorization.

42423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

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

The square root of 42423 is about 205.9684441850. The cubic root of 42423 is about 34.8765720441.

Adding to 42423 its reverse (32424), we get a palindrome (74847).

Subtracting from 42423 its reverse (32424), we obtain a palindrome (9999).

It can be divided in two parts, 42 and 423, that multiplied together give a triangular number (17766 = T₁₈₈).

The spelling of 42423 in words is "forty-two thousand, four hundred twenty-three", and thus it is an iban number.