1804004 has 12 divisors (see below), whose sum is σ = 3166464. Its totient is φ = 899304.

The previous prime is 1803973. The next prime is 1804007. The reversal of 1804004 is 4004081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1804007) 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 3 ways as a sum of consecutive naturals, for example, 2057 + ... + 2799.

It is an arithmetic number, because the mean of its divisors is an integer number (263872).

2^1804004 is an apocalyptic number.

It is an amenable number.

1804004 is a deficient number, since it is larger than the sum of its proper divisors (1362460).

1804004 is a wasteful number, since it uses less digits than its factorization.

1804004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1804004 is about 1343.1321602880. The cubic root of 1804004 is about 121.7341699177.

Adding to 1804004 its reverse (4004081), we get a palindrome (5808085).

The spelling of 1804004 in words is "one million, eight hundred four thousand, four".