12672621 has 24 divisors (see below), whose sum is σ = 19950840. Its totient is φ = 7704576.

The previous prime is 12672619. The next prime is 12672641. The reversal of 12672621 is 12627621.

It can be written as a sum of positive squares in 4 ways, for example, as 34596 + 12638025 = 186^2 + 3555^2 .

It is not a de Polignac number, because 12672621 - 2¹ = 12672619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12672641) 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 23 ways as a sum of consecutive naturals, for example, 9805 + ... + 11021.

It is an arithmetic number, because the mean of its divisors is an integer number (831285).

Almost surely, 2^12672621 is an apocalyptic number.

It is an amenable number.

12672621 is a deficient number, since it is larger than the sum of its proper divisors (7278219).

12672621 is a wasteful number, since it uses less digits than its factorization.

12672621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1322 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12672621 is about 3559.8624973445. The cubic root of 12672621 is about 233.1428756475.

The spelling of 12672621 in words is "twelve million, six hundred seventy-two thousand, six hundred twenty-one".