423505 has 4 divisors (see below), whose sum is σ = 508212. Its totient is φ = 338800.

The previous prime is 423503. The next prime is 423509. The reversal of 423505 is 505324.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123201 + 300304 = 351^2 + 548^2 .

It is not a de Polignac number, because 423505 - 2¹ = 423503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423503) 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, 42346 + ... + 42355.

It is an arithmetic number, because the mean of its divisors is an integer number (127053).

2⁴²³⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

423505 is a deficient number, since it is larger than the sum of its proper divisors (84707).

423505 is an equidigital number, since it uses as much as digits as its factorization.

423505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84706.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 423505 is about 650.7726177399. The cubic root of 423505 is about 75.0964684572.

Adding to 423505 its reverse (505324), we get a palindrome (928829).

The spelling of 423505 in words is "four hundred twenty-three thousand, five hundred five".