168321 has 8 divisors (see below), whose sum is σ = 236320. Its totient is φ = 106272.

The previous prime is 168293. The next prime is 168323. The reversal of 168321 is 123861.

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

It is not a de Polignac number, because 168321 - 2⁷ = 168193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168323) 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, 1420 + ... + 1533.

It is an arithmetic number, because the mean of its divisors is an integer number (29540).

2¹⁶⁸³²¹ is an apocalyptic number.

It is an amenable number.

168321 is a deficient number, since it is larger than the sum of its proper divisors (67999).

168321 is a wasteful number, since it uses less digits than its factorization.

168321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975.

The product of its digits is 288, while the sum is 21.

The square root of 168321 is about 410.2694236718. The cubic root of 168321 is about 55.2136046072.

The spelling of 168321 in words is "one hundred sixty-eight thousand, three hundred twenty-one".