Adding to 1004000 its reverse (4001), we get a palindrome (1008001).
Subtracting from 1004000 its reverse (4001), we obtain a palindrome (999999).
1004000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a congruent number.
It is an unprimeable number.
21004000 is an apocalyptic number.
1004000 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 1004000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1238328).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1004000 is an equidigital number, since it uses as much as digits as its factorization.
1004000 is an evil number, because the sum of its binary digits is even.
The square root of 1004000 is about 1001.9980039900. The cubic root of 1004000 is about 100.1331559496.
The spelling of 1004000 in words is "one million, four thousand".