42623 has 4 divisors (see below), whose sum is σ = 48720. Its totient is φ = 36528.

The previous prime is 42611. The next prime is 42641. The reversal of 42623 is 32624.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42623 is a prime.

It is a d-powerful number, because it can be written as 4 + 2¹¹ + 6⁵ + 2¹⁵ + 3³ .

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 42623.

It is not an unprimeable number, because it can be changed into a prime (42643) 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 3 ways as a sum of consecutive naturals, for example, 3038 + ... + 3051.

It is an arithmetic number, because the mean of its divisors is an integer number (12180).

2⁴²⁶²³ is an apocalyptic number.

42623 is a deficient number, since it is larger than the sum of its proper divisors (6097).

42623 is an equidigital number, since it uses as much as digits as its factorization.

42623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096.

The product of its digits is 288, while the sum is 17.

The square root of 42623 is about 206.4533845690. The cubic root of 42623 is about 34.9312937870.

Subtracting from 42623 its reverse (32624), we obtain a palindrome (9999).

The spelling of 42623 in words is "forty-two thousand, six hundred twenty-three".