Adding to 1223520 its reverse (253221), we get a palindrome (1476741).
Subtracting from 1223520 its reverse (253221), we obtain a cube (970299 = 993).
It is a tau number, because it is divible by the number of its divisors (48).
It is a self number, because there is not a number n which added to its sum of digits gives 1223520.
It is a congruent number.
21223520 is an apocalyptic number.
1223520 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 pseudoperfect number, because it is the sum of a subset of its proper divisors.
1223520 is a wasteful number, since it uses less digits than its factorization.
1223520 is an odious number, because the sum of its binary digits is odd.
The square root of 1223520 is about 1106.1283831455. The cubic root of 1223520 is about 106.9556400391.
The spelling of 1223520 in words is "one million, two hundred twenty-three thousand, five hundred twenty".