12538566 has 24 divisors (see below), whose sum is σ = 27746784. Its totient is φ = 4090320.

The previous prime is 12538549. The next prime is 12538607. The reversal of 12538566 is 66583521.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12538566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6565 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (1156116).

Almost surely, 2^12538566 is an apocalyptic number.

12538566 is an abundant number, since it is smaller than the sum of its proper divisors (15208218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12538566 is a wasteful number, since it uses less digits than its factorization.

12538566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14876 (or 14873 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 12538566 is about 3540.9837616120. The cubic root of 12538566 is about 232.3178733256.

The spelling of 12538566 in words is "twelve million, five hundred thirty-eight thousand, five hundred sixty-six".