Adding to 1123380 its reverse (833211), we get a palindrome (1956591).
It is a congruent number.
It is an unprimeable number.
21123380 is an apocalyptic number.
1123380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1123380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1725633).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1123380 is a wasteful number, since it uses less digits than its factorization.
1123380 is an odious number, because the sum of its binary digits is odd.
The square root of 1123380 is about 1059.8962213349. The cubic root of 1123380 is about 103.9542451591.
The spelling of 1123380 in words is "one million, one hundred twenty-three thousand, three hundred eighty".