1203804 has 72 divisors (see below), whose sum is σ = 3695328. Its totient is φ = 322560.

The previous prime is 1203799. The next prime is 1203809. The reversal of 1203804 is 4083021.

1203804 = 18² + 19² + ... + 153².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1203799) and next prime (1203809).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203809) 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 23 ways as a sum of consecutive naturals, for example, 4144 + ... + 4424.

It is an arithmetic number, because the mean of its divisors is an integer number (51324).

2^1203804 is an apocalyptic number.

1203804 is a gapful number since it is divisible by the number (14) 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 1203804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1847664).

1203804 is an abundant number, since it is smaller than the sum of its proper divisors (2491524).

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

1203804 is a wasteful number, since it uses less digits than its factorization.

1203804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1203804 is about 1097.1800216920. The cubic root of 1203804 is about 106.3780260650.

Adding to 1203804 its reverse (4083021), we get a palindrome (5286825).

The spelling of 1203804 in words is "one million, two hundred three thousand, eight hundred four".