12785509 has 8 divisors (see below), whose sum is σ = 14002560. Its totient is φ = 11577600.

The previous prime is 12785503. The next prime is 12785519. The reversal of 12785509 is 90558721.

12785509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12785509 - 2³ = 12785501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12785501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837 + ... + 5125.

It is an arithmetic number, because the mean of its divisors is an integer number (1750320).

Almost surely, 2^12785509 is an apocalyptic number.

It is an amenable number.

12785509 is a deficient number, since it is larger than the sum of its proper divisors (1217051).

12785509 is a wasteful number, since it uses less digits than its factorization.

12785509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4571.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 12785509 is about 3575.6830116776. The cubic root of 12785509 is about 233.8331108466.

The spelling of 12785509 in words is "twelve million, seven hundred eighty-five thousand, five hundred nine".