12766621 has 8 divisors (see below), whose sum is σ = 14946624. Its totient is φ = 10675680.

The previous prime is 12766603. The next prime is 12766639. The reversal of 12766621 is 12666721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12766603) and next prime (12766639).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12766621 - 2⁹ = 12766109 is a prime.

It is a super-2 number, since 2×12766621² = 325973223515282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12766681) 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 7 ways as a sum of consecutive naturals, for example, 21955 + ... + 22528.

It is an arithmetic number, because the mean of its divisors is an integer number (1868328).

Almost surely, 2^12766621 is an apocalyptic number.

It is an amenable number.

12766621 is a deficient number, since it is larger than the sum of its proper divisors (2180003).

12766621 is an equidigital number, since it uses as much as digits as its factorization.

12766621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44531.

The product of its digits is 6048, while the sum is 31.

The square root of 12766621 is about 3573.0408617871. The cubic root of 12766621 is about 233.7179070775.

The spelling of 12766621 in words is "twelve million, seven hundred sixty-six thousand, six hundred twenty-one".