12686121 has 24 divisors (see below), whose sum is σ = 21303360. Its totient is φ = 7124256.

The previous prime is 12686119. The next prime is 12686147. The reversal of 12686121 is 12168621.

It is not a de Polignac number, because 12686121 - 2¹ = 12686119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12686111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2011 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (887640).

Almost surely, 2^12686121 is an apocalyptic number.

It is an amenable number.

12686121 is a deficient number, since it is larger than the sum of its proper divisors (8617239).

12686121 is a wasteful number, since it uses less digits than its factorization.

12686121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485 (or 3482 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12686121 is about 3561.7581332819. The cubic root of 12686121 is about 233.2256344244.

The spelling of 12686121 in words is "twelve million, six hundred eighty-six thousand, one hundred twenty-one".