1320003003 has 16 divisors (see below), whose sum is σ = 1921562496. Its totient is φ = 799352640.

The previous prime is 1320002987. The next prime is 1320003007. The reversal of 1320003003 is 3003000231.

It is a happy number.

It is not a de Polignac number, because 1320003003 - 2⁴ = 1320002987 is a prime.

1320003003 is a modest number, since divided by 3003 gives 1320 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1320003003.

It is not an unprimeable number, because it can be changed into a prime (1320003007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26751 + ... + 57927.

It is an arithmetic number, because the mean of its divisors is an integer number (120097656).

Almost surely, 2^1320003003 is an apocalyptic number.

1320003003 is a deficient number, since it is larger than the sum of its proper divisors (601559493).

1320003003 is a wasteful number, since it uses less digits than its factorization.

1320003003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32474.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 1320003003 is about 36331.8455765737. The cubic root of 1320003003 is about 1096.9621423482.

Adding to 1320003003 its reverse (3003000231), we get a palindrome (4323003234).

The spelling of 1320003003 in words is "one billion, three hundred twenty million, three thousand, three".