12886621 has 6 divisors (see below), whose sum is σ = 14164766. Its totient is φ = 11715000.

The previous prime is 12886589. The next prime is 12886649. The reversal of 12886621 is 12668821.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 27225 = 3586^2 + 165^2 .

It is not a de Polignac number, because 12886621 - 2⁵ = 12886589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12886651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53130 + ... + 53371.

Almost surely, 2^12886621 is an apocalyptic number.

12886621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12886621 is a deficient number, since it is larger than the sum of its proper divisors (1278145).

12886621 is a wasteful number, since it uses less digits than its factorization.

12886621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106523 (or 106512 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 12886621 is about 3589.7940052321. The cubic root of 12886621 is about 234.4479026782.

The spelling of 12886621 in words is "twelve million, eight hundred eighty-six thousand, six hundred twenty-one".