1312503 has 4 divisors (see below), whose sum is σ = 1750008. Its totient is φ = 875000.

The previous prime is 1312471. The next prime is 1312513. The reversal of 1312503 is 3052131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3052131 = 3 ⋅1017377.

It is a cyclic number.

It is not a de Polignac number, because 1312503 - 2⁵ = 1312471 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312513) 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, 218748 + ... + 218753.

It is an arithmetic number, because the mean of its divisors is an integer number (437502).

2^1312503 is an apocalyptic number.

1312503 is a deficient number, since it is larger than the sum of its proper divisors (437505).

1312503 is an equidigital number, since it uses as much as digits as its factorization.

1312503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437504.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1312503 is about 1145.6452330456. The cubic root of 1312503 is about 109.4880619165.

Adding to 1312503 its reverse (3052131), we get a palindrome (4364634).

The spelling of 1312503 in words is "one million, three hundred twelve thousand, five hundred three".