24005 has 4 divisors (see below), whose sum is σ = 28812.
Its totient is φ = 19200.
The previous prime is 24001. The next prime is 24007. The reversal of 24005 is 50042.
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 11236 + 12769 = 106^2 + 113^2
It is not a de Polignac number, because 24005 - 22 = 24001 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (24001) 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, 2396 + ... + 2405.
It is an arithmetic number, because the mean of its divisors is an integer number (7203).
224005 is an apocalyptic number.
It is an amenable number.
24005 is a deficient number, since it is larger than the sum of its proper divisors (4807).
24005 is an equidigital number, since it uses as much as digits as its factorization.
24005 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4806.
The product of its (nonzero) digits is 40, while the sum is 11.
The square root of 24005 is about 154.9354704385.
The cubic root of 24005 is about 28.8469943915.
Adding to 24005 its reverse (50042), we get a palindrome (74047).
The spelling of 24005 in words is "twenty-four thousand, five".