1312003 has 12 divisors (see below), whose sum is σ = 1649200. Its totient is φ = 1021680.

The previous prime is 1312001. The next prime is 1312019. The reversal of 1312003 is 3002131.

It is not a de Polignac number, because 1312003 - 2¹ = 1312001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73 + ... + 1621.

2^1312003 is an apocalyptic number.

1312003 is a deficient number, since it is larger than the sum of its proper divisors (337197).

1312003 is a wasteful number, since it uses less digits than its factorization.

1312003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1312003 is about 1145.4269946182. The cubic root of 1312003 is about 109.4741569365.

Adding to 1312003 its reverse (3002131), we get a palindrome (4314134).

The spelling of 1312003 in words is "one million, three hundred twelve thousand, three".