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: 3764001 = 3 ⋅1254667.
It is a D-number.
It is a Duffinian number.
It is a zygodrome in base 6.
21004673 is an apocalyptic number.
It is an amenable number.
1004673 is an equidigital number, since it uses as much as digits as its factorization.
1004673 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 334894.
The square root of 1004673 is about 1002.3337767431. Note that the first 3 decimals coincide. The cubic root of 1004673 is about 100.1555246621.
Adding to 1004673 its reverse (3764001), we get a palindrome (4768674).
The spelling of 1004673 in words is "one million, four thousand, six hundred seventy-three".