12387641 has 12 divisors (see below), whose sum is σ = 14483700. Its totient is φ = 10563840.

The previous prime is 12387629. The next prime is 12387653. The reversal of 12387641 is 14678321.

12387641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12387629) and next prime (12387653).

It can be written as a sum of positive squares in 2 ways, for example, as 10368400 + 2019241 = 3220^2 + 1421^2 .

It is not a de Polignac number, because 12387641 - 2¹⁸ = 12125497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12387598 and 12387607.

It is not an unprimeable number, because it can be changed into a prime (12387671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11285 + ... + 12333.

It is an arithmetic number, because the mean of its divisors is an integer number (1206975).

Almost surely, 2^12387641 is an apocalyptic number.

It is an amenable number.

12387641 is a deficient number, since it is larger than the sum of its proper divisors (2096059).

12387641 is a wasteful number, since it uses less digits than its factorization.

12387641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304 (or 1297 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 12387641 is about 3519.6080747720. The cubic root of 12387641 is about 231.3819820246.

The spelling of 12387641 in words is "twelve million, three hundred eighty-seven thousand, six hundred forty-one".