1003604 has 24 divisors (see below), whose sum is σ = 2038848. Its totient is φ = 423360.

The previous prime is 1003601. The next prime is 1003609. The reversal of 1003604 is 4063001.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1799 + ... + 2289.

It is an arithmetic number, because the mean of its divisors is an integer number (84952).

2^1003604 is an apocalyptic number.

1003604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1003604 is an abundant number, since it is smaller than the sum of its proper divisors (1035244).

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

1003604 is a wasteful number, since it uses less digits than its factorization.

1003604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1003604 is about 1001.8003793172. The cubic root of 1003604 is about 100.1199893014.

Adding to 1003604 its reverse (4063001), we get a palindrome (5066605).

The spelling of 1003604 in words is "one million, three thousand, six hundred four".