Adding to 1403221 its reverse (1223041), we get a palindrome (2626262).
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1223041 = 193 ⋅6337.
It is a cyclic number.
It is a Duffinian number.
It is a zygodrome in base 4.
It is a congruent number.
It is a 546-hyperperfect number.
21403221 is an apocalyptic number.
It is an amenable number.
1403221 is an equidigital number, since it uses as much as digits as its factorization.
1403221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2570.
The square root of 1403221 is about 1184.5762955589. The cubic root of 1403221 is about 111.9546212849.
The spelling of 1403221 in words is "one million, four hundred three thousand, two hundred twenty-one".