24845 has 4 divisors (see below), whose sum is σ = 29820. Its totient is φ = 19872.

The previous prime is 24841. The next prime is 24847. The reversal of 24845 is 54842.

24845 = 90² + 91² + 92².

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 6889 + 17956 = 83^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 24845 - 2² = 24841 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 4⁴ + 8 + 4⁷ + 5 .

It is a self number, because there is not a number n which added to its sum of digits gives 24845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24841) 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, 2480 + ... + 2489.

It is an arithmetic number, because the mean of its divisors is an integer number (7455).

2²⁴⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

24845 is a deficient number, since it is larger than the sum of its proper divisors (4975).

24845 is an equidigital number, since it uses as much as digits as its factorization.

24845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4974.

The product of its digits is 1280, while the sum is 23.

The square root of 24845 is about 157.6229678695. The cubic root of 24845 is about 29.1796223622.

The spelling of 24845 in words is "twenty-four thousand, eight hundred forty-five".