320481 has 12 divisors (see below), whose sum is σ = 529152. Its totient is φ = 183096.

The previous prime is 320477. The next prime is 320483. The reversal of 320481 is 184023.

It is a happy number.

It is not a de Polignac number, because 320481 - 2² = 320477 is a prime.

It is a super-2 number, since 2×320481² = 205416142722, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320481.

It is not an unprimeable number, because it can be changed into a prime (320483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2481 + ... + 2606.

It is an arithmetic number, because the mean of its divisors is an integer number (44096).

2³²⁰⁴⁸¹ is an apocalyptic number.

It is an amenable number.

320481 is a deficient number, since it is larger than the sum of its proper divisors (208671).

320481 is a wasteful number, since it uses less digits than its factorization.

320481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100 (or 5097 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 320481 is about 566.1104132588. The cubic root of 320481 is about 68.4332914782.

The spelling of 320481 in words is "three hundred twenty thousand, four hundred eighty-one".