24665 has 4 divisors (see below), whose sum is σ = 29604. Its totient is φ = 19728.

The previous prime is 24659. The next prime is 24671. The reversal of 24665 is 56642.

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

It is an interprime number because it is at equal distance from previous prime (24659) and next prime (24671).

It can be written as a sum of positive squares in 2 ways, for example, as 8281 + 16384 = 91^2 + 128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24665 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 24665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2462 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (7401).

2²⁴⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

24665 is a deficient number, since it is larger than the sum of its proper divisors (4939).

24665 is an equidigital number, since it uses as much as digits as its factorization.

24665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938.

The product of its digits is 1440, while the sum is 23.

The square root of 24665 is about 157.0509471477. The cubic root of 24665 is about 29.1089835004.

Subtracting from 24665 its sum of digits (23), we obtain a palindrome (24642).

The spelling of 24665 in words is "twenty-four thousand, six hundred sixty-five".