423543 has 4 divisors (see below), whose sum is σ = 564728. Its totient is φ = 282360.

The previous prime is 423541. The next prime is 423547. The reversal of 423543 is 345324.

It is a happy number.

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

It is not a de Polignac number, because 423543 - 2¹ = 423541 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70588 + ... + 70593.

It is an arithmetic number, because the mean of its divisors is an integer number (141182).

2⁴²³⁵⁴³ is an apocalyptic number.

423543 is a deficient number, since it is larger than the sum of its proper divisors (141185).

423543 is a wasteful number, since it uses less digits than its factorization.

423543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141184.

The product of its digits is 1440, while the sum is 21.

The square root of 423543 is about 650.8018131505. The cubic root of 423543 is about 75.0987144602.

Adding to 423543 its reverse (345324), we get a palindrome (768867).

It can be divided in two parts, 4235 and 43, that added together give a triangular number (4278 = T₉₂).

The spelling of 423543 in words is "four hundred twenty-three thousand, five hundred forty-three".