12600009 has 32 divisors (see below), whose sum is σ = 20039040. Its totient is φ = 7796736.

The previous prime is 12600001. The next prime is 12600013. The reversal of 12600009 is 90000621.

It is not a de Polignac number, because 12600009 - 2³ = 12600001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12599964 and 12600000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12600001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44382 + ... + 44664.

It is an arithmetic number, because the mean of its divisors is an integer number (626220).

Almost surely, 2^12600009 is an apocalyptic number.

It is an amenable number.

12600009 is a deficient number, since it is larger than the sum of its proper divisors (7439031).

12600009 is a wasteful number, since it uses less digits than its factorization.

12600009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12600009 is about 3549.6491375909. The cubic root of 12600009 is about 232.6967325490.

The spelling of 12600009 in words is "twelve million, six hundred thousand, nine".