12566601 has 12 divisors (see below), whose sum is σ = 18220020. Its totient is φ = 8346240.

The previous prime is 12566597. The next prime is 12566627. The reversal of 12566601 is 10666521.

It is a happy number.

12566601 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5405625 + 7160976 = 2325^2 + 2676^2 .

It is not a de Polignac number, because 12566601 - 2² = 12566597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12566101) 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, 45 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (1518335).

Almost surely, 2^12566601 is an apocalyptic number.

It is an amenable number.

12566601 is a deficient number, since it is larger than the sum of its proper divisors (5653419).

12566601 is a wasteful number, since it uses less digits than its factorization.

12566601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256 (or 5253 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 12566601 is about 3544.9401969568. The cubic root of 12566601 is about 232.4908910757.

The spelling of 12566601 in words is "twelve million, five hundred sixty-six thousand, six hundred one".