239321 has 4 divisors (see below), whose sum is σ = 242100. Its totient is φ = 236544.

The previous prime is 239297. The next prime is 239329. The reversal of 239321 is 123932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24025 + 215296 = 155^2 + 464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239293 and 239302.

It is not an unprimeable number, because it can be changed into a prime (239329) 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, 1256 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (60525).

2²³⁹³²¹ is an apocalyptic number.

It is an amenable number.

239321 is a deficient number, since it is larger than the sum of its proper divisors (2779).

239321 is an equidigital number, since it uses as much as digits as its factorization.

239321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778.

The product of its digits is 324, while the sum is 20.

The square root of 239321 is about 489.2044562348. The cubic root of 239321 is about 62.0859889059.

The spelling of 239321 in words is "two hundred thirty-nine thousand, three hundred twenty-one".