12145513 has 2 divisors, whose sum is σ = 12145514. Its totient is φ = 12145512.

The previous prime is 12145501. The next prime is 12145537. The reversal of 12145513 is 31554121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10575504 + 1570009 = 3252^2 + 1253^2 .

It is an emirp because it is prime and its reverse (31554121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12145513 is a prime.

It is not a weakly prime, because it can be changed into another prime (12145013) 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, 6072756 + 6072757.

It is an arithmetic number, because the mean of its divisors is an integer number (6072757).

Almost surely, 2^12145513 is an apocalyptic number.

It is an amenable number.

12145513 is a deficient number, since it is larger than the sum of its proper divisors (1).

12145513 is an equidigital number, since it uses as much as digits as its factorization.

12145513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 22.

The square root of 12145513 is about 3485.0413196977. The cubic root of 12145513 is about 229.8645263948.

Adding to 12145513 its reverse (31554121), we get a palindrome (43699634).

The spelling of 12145513 in words is "twelve million, one hundred forty-five thousand, five hundred thirteen".