1006603 has 4 divisors (see below), whose sum is σ = 1084048. Its totient is φ = 929160.

The previous prime is 1006589. The next prime is 1006609. The reversal of 1006603 is 3066001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1006603 - 2⁹ = 1006091 is a prime.

It is a Duffinian number.

1006603 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1006609) 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, 38703 + ... + 38728.

It is an arithmetic number, because the mean of its divisors is an integer number (271012).

2^1006603 is an apocalyptic number.

1006603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1006603 is a deficient number, since it is larger than the sum of its proper divisors (77445).

1006603 is an equidigital number, since it uses as much as digits as its factorization.

1006603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77444.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1006603 is about 1003.2960679680. The cubic root of 1006603 is about 100.2196173292.

The spelling of 1006603 in words is "one million, six thousand, six hundred three".