1312515503 has 8 divisors (see below), whose sum is σ = 1427474496. Its totient is φ = 1199556000.

The previous prime is 1312515499. The next prime is 1312515509. The reversal of 1312515503 is 3055152131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312515503 - 2² = 1312515499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312515509) 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 7 ways as a sum of consecutive naturals, for example, 498503 + ... + 501128.

It is an arithmetic number, because the mean of its divisors is an integer number (178434312).

Almost surely, 2^1312515503 is an apocalyptic number.

1312515503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312515503 is a deficient number, since it is larger than the sum of its proper divisors (114958993).

1312515503 is a wasteful number, since it uses less digits than its factorization.

1312515503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999745.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1312515503 is about 36228.6558265691. The cubic root of 1312515503 is about 1094.8840957922.

Adding to 1312515503 its reverse (3055152131), we get a palindrome (4367667634).

The spelling of 1312515503 in words is "one billion, three hundred twelve million, five hundred fifteen thousand, five hundred three".