423345 has 24 divisors (see below), whose sum is σ = 737856. Its totient is φ = 207168.

The previous prime is 423341. The next prime is 423347. The reversal of 423345 is 543324.

It is a happy number.

It is not a de Polignac number, because 423345 - 2² = 423341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423341) 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 23 ways as a sum of consecutive naturals, for example, 2452 + ... + 2618.

It is an arithmetic number, because the mean of its divisors is an integer number (30744).

2⁴²³³⁴⁵ is an apocalyptic number.

It is an amenable number.

423345 is a deficient number, since it is larger than the sum of its proper divisors (314511).

423345 is a wasteful number, since it uses less digits than its factorization.

423345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 188 counting only the distinct ones).

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

The square root of 423345 is about 650.6496753246. The cubic root of 423345 is about 75.0870101286.

Subtracting from 423345 its sum of digits (21), we obtain a palindrome (423324).

Adding to 423345 its reverse (543324), we get a palindrome (966669).

It can be divided in two parts, 4233 and 45, that added together give a triangular number (4278 = T₉₂).

The spelling of 423345 in words is "four hundred twenty-three thousand, three hundred forty-five".