1304004 has 36 divisors (see below), whose sum is σ = 3299856. Its totient is φ = 400608.

The previous prime is 1304003. The next prime is 1304029. The reversal of 1304004 is 4004031.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1304003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1707 + ... + 2349.

2^1304004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1304004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649928).

1304004 is an abundant number, since it is smaller than the sum of its proper divisors (1995852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1304004 is a wasteful number, since it uses less digits than its factorization.

1304004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1304004 is about 1141.9299453119. The cubic root of 1304004 is about 109.2512231342.

Adding to 1304004 its reverse (4004031), we get a palindrome (5308035).

The spelling of 1304004 in words is "one million, three hundred four thousand, four".