423605 has 32 divisors (see below), whose sum is σ = 672000. Its totient is φ = 254016.

The previous prime is 423601. The next prime is 423617. The reversal of 423605 is 506324.

It is not a de Polignac number, because 423605 - 2² = 423601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423601) 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, 22286 + ... + 22304.

It is an arithmetic number, because the mean of its divisors is an integer number (21000).

2⁴²³⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

423605 is a deficient number, since it is larger than the sum of its proper divisors (248395).

423605 is a wasteful number, since it uses less digits than its factorization.

423605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 423605 is about 650.8494449564. The cubic root of 423605 is about 75.1023787029.

Adding to 423605 its reverse (506324), we get a palindrome (929929).

The spelling of 423605 in words is "four hundred twenty-three thousand, six hundred five".