87321 has 8 divisors (see below), whose sum is σ = 125440. Its totient is φ = 53712.

The previous prime is 87317. The next prime is 87323. The reversal of 87321 is 12378.

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

It is not a de Polignac number, because 87321 - 2² = 87317 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 87 and 321 contains 87321 itself.

It is the 296-th Hogben number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87321.

It is not an unprimeable number, because it can be changed into a prime (87323) by changing a digit.

It is a nontrivial repunit in base 295.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (15680).

2⁸⁷³²¹ is an apocalyptic number.

It is an amenable number.

87321 is a deficient number, since it is larger than the sum of its proper divisors (38119).

87321 is a wasteful number, since it uses less digits than its factorization.

87321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255.

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

The square root of 87321 is about 295.5012690328. The cubic root of 87321 is about 44.3649061218.

Adding to 87321 its reverse (12378), we get a palindrome (99699).

The spelling of 87321 in words is "eighty-seven thousand, three hundred twenty-one".