1123231 has 2 divisors, whose sum is σ = 1123232.
Its totient is φ = 1123230.
The previous prime is 1123219. The next prime is 1123247. The reversal of 1123231 is 1323211.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1123231 is a prime.
It is a super-2 number, since 2×11232312 = 2523295758722, which contains 22 as substring.
1123231 is a lucky number.
It is a plaindrome in base 16.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1123211) 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, 561615 + 561616.
It is an arithmetic number, because the mean of its divisors is an integer number (561616).
21123231 is an apocalyptic number.
1123231 is a deficient number, since it is larger than the sum of its proper divisors (1).
1123231 is an equidigital number, since it uses as much as digits as its factorization.
1123231 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 36, while the sum is 13.
The square root of 1123231 is about 1059.8259291035.
The cubic root of 1123231 is about 103.9496489502.
Adding to 1123231 its reverse (1323211), we get a palindrome (2446442).
The spelling of 1123231 in words is "one million, one hundred twenty-three thousand, two hundred thirty-one".