12966487 has 4 divisors (see below), whose sum is σ = 13046200. Its totient is φ = 12886776.

The previous prime is 12966469. The next prime is 12966491. The reversal of 12966487 is 78466921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12966487 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 (12966497) 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, 39612 + ... + 39937.

It is an arithmetic number, because the mean of its divisors is an integer number (3261550).

Almost surely, 2^12966487 is an apocalyptic number.

12966487 is a deficient number, since it is larger than the sum of its proper divisors (79713).

12966487 is an equidigital number, since it uses as much as digits as its factorization.

12966487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79712.

The product of its digits is 145152, while the sum is 43.

The square root of 12966487 is about 3600.9008595072. The cubic root of 12966487 is about 234.9312428997.

The spelling of 12966487 in words is "twelve million, nine hundred sixty-six thousand, four hundred eighty-seven".