100321 has 4 divisors (see below), whose sum is σ = 108052. Its totient is φ = 92592.

The previous prime is 100313. The next prime is 100333. The reversal of 100321 is 123001.

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 30625 + 69696 = 175^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 100321 - 2³ = 100313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100361) 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, 3846 + ... + 3871.

It is an arithmetic number, because the mean of its divisors is an integer number (27013).

2¹⁰⁰³²¹ is an apocalyptic number.

It is an amenable number.

100321 is a deficient number, since it is larger than the sum of its proper divisors (7731).

100321 is an equidigital number, since it uses as much as digits as its factorization.

100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 100321 is about 316.7349049284. The cubic root of 100321 is about 46.4655002897.

Adding to 100321 its reverse (123001), we get a palindrome (223322).

It can be divided in two parts, 1003 and 21, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 100321 in words is "one hundred thousand, three hundred twenty-one", and thus it is an iban number.