1312531525 has 12 divisors (see below), whose sum is σ = 1671527812. Its totient is φ = 1021645440.

The previous prime is 1312531511. The next prime is 1312531531. The reversal of 1312531525 is 5251352131.

It can be written as a sum of positive squares in 6 ways, for example, as 113571649 + 1198959876 = 10657^2 + 34626^2 .

It is not a de Polignac number, because 1312531525 - 2⁷ = 1312531397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312531493 and 1312531502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 708552 + ... + 710401.

Almost surely, 2^1312531525 is an apocalyptic number.

It is an amenable number.

1312531525 is a deficient number, since it is larger than the sum of its proper divisors (358996287).

1312531525 is a wasteful number, since it uses less digits than its factorization.

1312531525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419000 (or 1418995 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 1312531525 is about 36228.8769491962. The cubic root of 1312531525 is about 1094.8885508917. Note that the first 3 decimals are identical.

Adding to 1312531525 its reverse (5251352131), we get a palindrome (6563883656).

The spelling of 1312531525 in words is "one billion, three hundred twelve million, five hundred thirty-one thousand, five hundred twenty-five".