1131223 has 2 divisors, whose sum is σ = 1131224.
Its totient is φ = 1131222.
The previous prime is 1131217. The next prime is 1131239. The reversal of 1131223 is 3221311.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 1131223 - 25 = 1131191 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1131253) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565611 + 565612.
It is an arithmetic number, because the mean of its divisors is an integer number (565612).
21131223 is an apocalyptic number.
1131223 is a deficient number, since it is larger than the sum of its proper divisors (1).
1131223 is an equidigital number, since it uses as much as digits as its factorization.
1131223 is an evil number, because the sum of its binary digits is even.
The product of its digits is 36, while the sum is 13.
The square root of 1131223 is about 1063.5896765200.
The cubic root of 1131223 is about 104.1956069633.
Adding to 1131223 its reverse (3221311), we get a palindrome (4352534).
The spelling of 1131223 in words is "one million, one hundred thirty-one thousand, two hundred twenty-three".