12886209 has 20 divisors (see below), whose sum is σ = 22000704. Its totient is φ = 7363224.

The previous prime is 12886183. The next prime is 12886213. The reversal of 12886209 is 90268821.

12886209 is a `hidden beast` number, since 1 + 28 + 8 + 620 + 9 = 666.

It is not a de Polignac number, because 12886209 - 2¹¹ = 12884161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12886229) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10797 + ... + 11930.

Almost surely, 2^12886209 is an apocalyptic number.

It is an amenable number.

12886209 is a deficient number, since it is larger than the sum of its proper divisors (9114495).

12886209 is an equidigital number, since it uses as much as digits as its factorization.

12886209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22746 (or 22737 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 12886209 is about 3589.7366198650. The cubic root of 12886209 is about 234.4454041291.

The spelling of 12886209 in words is "twelve million, eight hundred eighty-six thousand, two hundred nine".