1604603 has 24 divisors (see below), whose sum is σ = 2202480. Its totient is φ = 1149120.

The previous prime is 1604597. The next prime is 1604609. The reversal of 1604603 is 3064061.

It is an interprime number because it is at equal distance from previous prime (1604597) and next prime (1604609).

It is not a de Polignac number, because 1604603 - 2⁶ = 1604539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6893 + ... + 7121.

It is an arithmetic number, because the mean of its divisors is an integer number (91770).

2^1604603 is an apocalyptic number.

1604603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1604603 is a deficient number, since it is larger than the sum of its proper divisors (597877).

1604603 is a wasteful number, since it uses less digits than its factorization.

1604603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1604603 is about 1266.7292528398. The cubic root of 1604603 is about 117.0727625900.

Adding to 1604603 its reverse (3064061), we get a palindrome (4668664).

The spelling of 1604603 in words is "one million, six hundred four thousand, six hundred three".