12566149 has 4 divisors (see below), whose sum is σ = 12586336. Its totient is φ = 12545964.

The previous prime is 12566101. The next prime is 12566161. The reversal of 12566149 is 94166521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12566149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9129 + ... + 10414.

It is an arithmetic number, because the mean of its divisors is an integer number (3146584).

Almost surely, 2^12566149 is an apocalyptic number.

It is an amenable number.

12566149 is a deficient number, since it is larger than the sum of its proper divisors (20187).

12566149 is an equidigital number, since it uses as much as digits as its factorization.

12566149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20186.

The product of its digits is 12960, while the sum is 34.

The square root of 12566149 is about 3544.8764435450. The cubic root of 12566149 is about 232.4881036037.

The spelling of 12566149 in words is "twelve million, five hundred sixty-six thousand, one hundred forty-nine".