17481 has 4 divisors (see below), whose sum is σ = 23312. Its totient is φ = 11652.

The previous prime is 17477. The next prime is 17483. The reversal of 17481 is 18471.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 17481 - 2² = 17477 is a prime.

It is a super-2 number, since 2×17481² = 611170722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 17481.

It is not an unprimeable number, because it can be changed into a prime (17483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2911 + ... + 2916.

It is an arithmetic number, because the mean of its divisors is an integer number (5828).

2¹⁷⁴⁸¹ is an apocalyptic number.

It is an amenable number.

17481 is a deficient number, since it is larger than the sum of its proper divisors (5831).

17481 is an equidigital number, since it uses as much as digits as its factorization.

17481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830.

The product of its digits is 224, while the sum is 21.

The square root of 17481 is about 132.2157328006. The cubic root of 17481 is about 25.9530711651.

Subtracting 17481 from its reverse (18471), we obtain a triangular number (990 = T₄₄).

The spelling of 17481 in words is "seventeen thousand, four hundred eighty-one".