64321 has 4 divisors (see below), whose sum is σ = 64944. Its totient is φ = 63700.

The previous prime is 64319. The next prime is 64327. The reversal of 64321 is 12346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12346 = 2 ⋅6173.

It is a cyclic number.

It is not a de Polignac number, because 64321 - 2¹ = 64319 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 10 and base 16.

It is a junction number, because it is equal to n+sod(n) for n = 64295 and 64304.

It is not an unprimeable number, because it can be changed into a prime (64327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115 + ... + 376.

It is an arithmetic number, because the mean of its divisors is an integer number (16236).

2⁶⁴³²¹ is an apocalyptic number.

It is an amenable number.

64321 is a deficient number, since it is larger than the sum of its proper divisors (623).

64321 is a wasteful number, since it uses less digits than its factorization.

64321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622.

The product of its digits is 144, while the sum is 16.

The square root of 64321 is about 253.6158512396. The cubic root of 64321 is about 40.0667635039.

Adding to 64321 its reverse (12346), we get a palindrome (76667).

The spelling of 64321 in words is "sixty-four thousand, three hundred twenty-one".