1100321 has 2 divisors, whose sum is σ = 1100322.
Its totient is φ = 1100320.
The previous prime is 1100311. The next prime is 1100353. The reversal of 1100321 is 1230011.
Adding to 1100321 its reverse (1230011), we get a palindrome (2330332).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 829921 + 270400 = 911^2 + 520^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1100321 is a prime.
It is a Sophie Germain prime.
It is a Chen prime.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 1100299 and 1100308.
It is not a weakly prime, because it can be changed into another prime (1100311) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550160 + 550161.
It is an arithmetic number, because the mean of its divisors is an integer number (550161).
21100321 is an apocalyptic number.
It is an amenable number.
1100321 is a deficient number, since it is larger than the sum of its proper divisors (1).
1100321 is an equidigital number, since it uses as much as digits as its factorization.
1100321 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 6, while the sum is 8.
The square root of 1100321 is about 1048.9618677531.
The cubic root of 1100321 is about 103.2380518393.
The spelling of 1100321 in words is "one million, one hundred thousand, three hundred twenty-one".