12509611 has 2 divisors, whose sum is σ = 12509612. Its totient is φ = 12509610.

The previous prime is 12509599. The next prime is 12509641. The reversal of 12509611 is 11690521.

It is a weak prime.

It is an emirp because it is prime and its reverse (11690521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12509611 - 2⁵ = 12509579 is a prime.

It is not a weakly prime, because it can be changed into another prime (12509641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6254805 + 6254806.

It is an arithmetic number, because the mean of its divisors is an integer number (6254806).

Almost surely, 2^12509611 is an apocalyptic number.

12509611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12509611 is an equidigital number, since it uses as much as digits as its factorization.

12509611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 12509611 is about 3536.8928454224. The cubic root of 12509611 is about 232.1389068564.

The spelling of 12509611 in words is "twelve million, five hundred nine thousand, six hundred eleven".