It is a sphenic number, since it is the product of 3 distinct primes.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 1223173.
It is a congruent number.
21223173 is an apocalyptic number.
It is an amenable number.
1223173 is an equidigital number, since it uses as much as digits as its factorization.
1223173 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1091.
The square root of 1223173 is about 1105.9715186206. The cubic root of 1223173 is about 106.9455279264.
Adding to 1223173 its reverse (3713221), we get a palindrome (4936394).
The spelling of 1223173 in words is "one million, two hundred twenty-three thousand, one hundred seventy-three".