320871 has 4 divisors (see below), whose sum is σ = 427832. Its totient is φ = 213912.

The previous prime is 320867. The next prime is 320899. The reversal of 320871 is 178023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178023 = 3 ⋅59341.

It is not a de Polignac number, because 320871 - 2² = 320867 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320871.

It is not an unprimeable number, because it can be changed into a prime (320821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53476 + ... + 53481.

It is an arithmetic number, because the mean of its divisors is an integer number (106958).

2³²⁰⁸⁷¹ is an apocalyptic number.

320871 is a deficient number, since it is larger than the sum of its proper divisors (106961).

320871 is a wasteful number, since it uses less digits than its factorization.

320871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106960.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 320871 is about 566.4547643016. The cubic root of 320871 is about 68.4610395245.

Adding to 320871 its reverse (178023), we get a palindrome (498894).

The spelling of 320871 in words is "three hundred twenty thousand, eight hundred seventy-one".