24981 has 8 divisors (see below), whose sum is σ = 36384. Its totient is φ = 15120.

The previous prime is 24979. The next prime is 24989. The reversal of 24981 is 18942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 24981 - 2¹ = 24979 is a prime.

It is a super-2 number, since 2×24981² = 1248100722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346 + ... + 411.

It is an arithmetic number, because the mean of its divisors is an integer number (4548).

2²⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

24981 is a deficient number, since it is larger than the sum of its proper divisors (11403).

24981 is a wasteful number, since it uses less digits than its factorization.

24981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its digits is 576, while the sum is 24.

The square root of 24981 is about 158.0537883127. The cubic root of 24981 is about 29.2327679932.

The spelling of 24981 in words is "twenty-four thousand, nine hundred eighty-one".