24986 has 12 divisors (see below), whose sum is σ = 41706. Its totient is φ = 11160.

The previous prime is 24979. The next prime is 24989. The reversal of 24986 is 68942.

24986 = 40² + 41² + ... + 51².

24986 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in only one way, i.e., 24025 + 961 = 155^2 + 31^2 .

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 5 ways as a sum of consecutive naturals, for example, 791 + ... + 821.

2²⁴⁹⁸⁶ is an apocalyptic number.

24986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

24986 is a deficient number, since it is larger than the sum of its proper divisors (16720).

24986 is a wasteful number, since it uses less digits than its factorization.

24986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 46 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 24986 is about 158.0696049214. The cubic root of 24986 is about 29.2347181965.

Subtracting 24986 from its reverse (68942), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 24986 in words is "twenty-four thousand, nine hundred eighty-six".