12509513 has 2 divisors, whose sum is σ = 12509514. Its totient is φ = 12509512.

The previous prime is 12509509. The next prime is 12509531. The reversal of 12509513 is 31590521.

Together with next prime (12509531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6492304 + 6017209 = 2548^2 + 2453^2 .

It is a cyclic number.

It is not a de Polignac number, because 12509513 - 2² = 12509509 is a prime.

It is not a weakly prime, because it can be changed into another prime (12509533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6254756 + 6254757.

It is an arithmetic number, because the mean of its divisors is an integer number (6254757).

Almost surely, 2^12509513 is an apocalyptic number.

It is an amenable number.

12509513 is a deficient number, since it is larger than the sum of its proper divisors (1).

12509513 is an equidigital number, since it uses as much as digits as its factorization.

12509513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 12509513 is about 3536.8789914273. The cubic root of 12509513 is about 232.1383006646.

The spelling of 12509513 in words is "twelve million, five hundred nine thousand, five hundred thirteen".