12606509 has 2 divisors, whose sum is σ = 12606510. Its totient is φ = 12606508.

The previous prime is 12606497. The next prime is 12606521. The reversal of 12606509 is 90560621.

It is a balanced prime because it is at equal distance from previous prime (12606497) and next prime (12606521).

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 426409 = 3490^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 12606509 - 2¹⁶ = 12540973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12606569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6303254 + 6303255.

It is an arithmetic number, because the mean of its divisors is an integer number (6303255).

Almost surely, 2^12606509 is an apocalyptic number.

It is an amenable number.

12606509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12606509 is an equidigital number, since it uses as much as digits as its factorization.

12606509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 12606509 is about 3550.5646029892. The cubic root of 12606509 is about 232.7367396301.

The spelling of 12606509 in words is "twelve million, six hundred six thousand, five hundred nine".