1009321 has 2 divisors, whose sum is σ = 1009322. Its totient is φ = 1009320.

The previous prime is 1009319. The next prime is 1009343. The reversal of 1009321 is 1239001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876096 + 133225 = 936^2 + 365^2 .

It is an emirp because it is prime and its reverse (1239001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1009321 - 2¹ = 1009319 is a prime.

Together with 1009319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1009295 and 1009304.

It is not a weakly prime, because it can be changed into another prime (1009301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504660 + 504661.

It is an arithmetic number, because the mean of its divisors is an integer number (504661).

2^1009321 is an apocalyptic number.

It is an amenable number.

1009321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009321 is an equidigital number, since it uses as much as digits as its factorization.

1009321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1009321 is about 1004.6496901906. The cubic root of 1009321 is about 100.3097396231.

The spelling of 1009321 in words is "one million, nine thousand, three hundred twenty-one".