12147529 has 2 divisors, whose sum is σ = 12147530. Its totient is φ = 12147528.

The previous prime is 12147463. The next prime is 12147533. The reversal of 12147529 is 92574121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 2304 = 3485^2 + 48^2 .

It is an emirp because it is prime and its reverse (92574121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12147529 - 2²¹ = 10050377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12147529.

It is not a weakly prime, because it can be changed into another prime (12147539) 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, 6073764 + 6073765.

It is an arithmetic number, because the mean of its divisors is an integer number (6073765).

Almost surely, 2^12147529 is an apocalyptic number.

It is an amenable number.

12147529 is a deficient number, since it is larger than the sum of its proper divisors (1).

12147529 is an equidigital number, since it uses as much as digits as its factorization.

12147529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 12147529 is about 3485.3305438652. The cubic root of 12147529 is about 229.8772438828.

The spelling of 12147529 in words is "twelve million, one hundred forty-seven thousand, five hundred twenty-nine".