423705 has 16 divisors (see below), whose sum is σ = 693504. Its totient is φ = 220800.

The previous prime is 423697. The next prime is 423707. The reversal of 423705 is 507324.

It is a happy number.

It is not a de Polignac number, because 423705 - 2³ = 423697 is a prime.

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 423705.

It is not an unprimeable number, because it can be changed into a prime (423707) 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 15 ways as a sum of consecutive naturals, for example, 405 + ... + 1005.

It is an arithmetic number, because the mean of its divisors is an integer number (43344).

2⁴²³⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

423705 is a deficient number, since it is larger than the sum of its proper divisors (269799).

423705 is a wasteful number, since it uses less digits than its factorization.

423705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 423705 is about 650.9262631051. The cubic root of 423705 is about 75.1082880186.

It can be divided in two parts, 423 and 705, that added together give a triangular number (1128 = T₄₇).

The spelling of 423705 in words is "four hundred twenty-three thousand, seven hundred five".