12621687 has 16 divisors (see below), whose sum is σ = 18912768. Its totient is φ = 7428960.

The previous prime is 12621671. The next prime is 12621703. The reversal of 12621687 is 78612621.

It is an interprime number because it is at equal distance from previous prime (12621671) and next prime (12621703).

It is not a de Polignac number, because 12621687 - 2⁴ = 12621671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6139 + ... + 7932.

It is an arithmetic number, because the mean of its divisors is an integer number (1182048).

Almost surely, 2^12621687 is an apocalyptic number.

12621687 is a deficient number, since it is larger than the sum of its proper divisors (6291081).

12621687 is a wasteful number, since it uses less digits than its factorization.

12621687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14110.

The product of its digits is 8064, while the sum is 33.

The square root of 12621687 is about 3552.7013665660. The cubic root of 12621687 is about 232.8301057238.

The spelling of 12621687 in words is "twelve million, six hundred twenty-one thousand, six hundred eighty-seven".