1004000 has 48 divisors (see below), whose sum is σ = 2476656. Its totient is φ = 400000.

The previous prime is 1003963. The next prime is 1004027. The reversal of 1004000 is 4001.

1004000 = T₅₉ + T₆₀ + ... + T₁₈₃.

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 Harshad number since it is a multiple of its sum of digits (5).

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.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3875 + ... + 4125.

It is an arithmetic number, because the mean of its divisors is an integer number (51597).

2^1004000 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).

1004000 is an abundant number, since it is smaller than the sum of its proper divisors (1472656).

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 sum of its prime factors is 276 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 1004000 is about 1001.9980039900. The cubic root of 1004000 is about 100.1331559496.

Adding to 1004000 its reverse (4001), we get a palindrome (1008001).

Subtracting from 1004000 its reverse (4001), we obtain a palindrome (999999).

The spelling of 1004000 in words is "one million, four thousand".