12860509 has 4 divisors (see below), whose sum is σ = 12882304. Its totient is φ = 12838716.

The previous prime is 12860501. The next prime is 12860531. The reversal of 12860509 is 90506821.

12860509 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12860509 - 2³ = 12860501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12860501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9987 + ... + 11200.

It is an arithmetic number, because the mean of its divisors is an integer number (3220576).

Almost surely, 2^12860509 is an apocalyptic number.

It is an amenable number.

12860509 is a deficient number, since it is larger than the sum of its proper divisors (21795).

12860509 is an equidigital number, since it uses as much as digits as its factorization.

12860509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21794.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 12860509 is about 3586.1551834799. The cubic root of 12860509 is about 234.2894426441.

The spelling of 12860509 in words is "twelve million, eight hundred sixty thousand, five hundred nine".