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8481 = 311257

8481 has 8 divisors (see below), whose sum is σ = 12384. Its totient is φ = 5120.

The previous prime is 8467. The next prime is 8501. The reversal of 8481 is 1848.

8481 is nontrivially palindromic in base 2.

8481 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

8481 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

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

It is a 2-Lehmer number, since φ(8481) divides (8481-1)2.

It is a cyclic number.

It is not a de Polignac number, because 8481 - 27 = 8353 is a prime.

It is a super-2 number, since 2×84812 = 143854722, which contains 22 as substring.

8481 is an undulating number in base 16.

It is a Curzon number.

It is a nialpdrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 8481.

It is not an unprimeable number, because it can be changed into a prime (8431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 161.

It is an arithmetic number, because the mean of its divisors is an integer number (1548).

It is a Poulet number, since it divides 28480-1.

28481 is an apocalyptic number.

It is an amenable number.

8481 is a deficient number, since it is larger than the sum of its proper divisors (3903).

8481 is a wasteful number, since it uses less digits than its factorization.

8481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its digits is 256, while the sum is 21.

The square root of 8481 is about 92.0923449587. The cubic root of 8481 is about 20.3930579993.

The spelling of 8481 in words is "eight thousand, four hundred eighty-one".

Divisors: 1 3 11 33 257 771 2827 8481