1103213 has 2 divisors, whose sum is σ = 1103214.
Its totient is φ = 1103212.
The previous prime is 1103203. The next prime is 1103237. The reversal of 1103213 is 3123011.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 769129 + 334084 = 877^2 + 578^2
It is a cyclic number.
It is not a de Polignac number, because 1103213 - 212 = 1099117 is a prime.
It is an Ulam number.
It is a junction number, because it is equal to n+sod(n) for n = 1103194 and 1103203.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1103203) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551606 + 551607.
It is an arithmetic number, because the mean of its divisors is an integer number (551607).
21103213 is an apocalyptic number.
It is an amenable number.
1103213 is a deficient number, since it is larger than the sum of its proper divisors (1).
1103213 is an equidigital number, since it uses as much as digits as its factorization.
1103213 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 18, while the sum is 11.
The square root of 1103213 is about 1050.3394689337.
The cubic root of 1103213 is about 103.3284203931.
Adding to 1103213 its reverse (3123011), we get a palindrome (4226224).
The spelling of 1103213 in words is "one million, one hundred three thousand, two hundred thirteen".