321081 has 16 divisors (see below), whose sum is σ = 464640. Its totient is φ = 196560.

The previous prime is 321077. The next prime is 321091. The reversal of 321081 is 180123.

It is a happy number.

It is not a de Polignac number, because 321081 - 2² = 321077 is a prime.

It is a super-2 number, since 2×321081² = 206186017122, which contains 22 as substring.

It is a Curzon number.

321081 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 321081.

It is not an unprimeable number, because it can be changed into a prime (321031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2386 + ... + 2516.

It is an arithmetic number, because the mean of its divisors is an integer number (29040).

2³²¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

321081 is a deficient number, since it is larger than the sum of its proper divisors (143559).

321081 is a wasteful number, since it uses less digits than its factorization.

321081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 321081 is about 566.6400974163. The cubic root of 321081 is about 68.4759714681.

The spelling of 321081 in words is "three hundred twenty-one thousand, eighty-one".