12513409 has 2 divisors, whose sum is σ = 12513410. Its totient is φ = 12513408.

The previous prime is 12513407. The next prime is 12513433. The reversal of 12513409 is 90431521.

12513409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8573184 + 3940225 = 2928^2 + 1985^2 .

It is an emirp because it is prime and its reverse (90431521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12513409 - 2¹ = 12513407 is a prime.

Together with 12513407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12513401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256704 + 6256705.

It is an arithmetic number, because the mean of its divisors is an integer number (6256705).

Almost surely, 2^12513409 is an apocalyptic number.

It is an amenable number.

12513409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513409 is an equidigital number, since it uses as much as digits as its factorization.

12513409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12513409 is about 3537.4297166163. The cubic root of 12513409 is about 232.1623974445.

The spelling of 12513409 in words is "twelve million, five hundred thirteen thousand, four hundred nine".