12125609 has 2 divisors, whose sum is σ = 12125610. Its totient is φ = 12125608.

The previous prime is 12125599. The next prime is 12125647. The reversal of 12125609 is 90652121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7546009 + 4579600 = 2747^2 + 2140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12125609 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12125689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6062804 + 6062805.

It is an arithmetic number, because the mean of its divisors is an integer number (6062805).

Almost surely, 2^12125609 is an apocalyptic number.

It is an amenable number.

12125609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12125609 is an equidigital number, since it uses as much as digits as its factorization.

12125609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 12125609 is about 3482.1845155017. The cubic root of 12125609 is about 229.7388908317.

The spelling of 12125609 in words is "twelve million, one hundred twenty-five thousand, six hundred nine".