12971566 has 8 divisors (see below), whose sum is σ = 20481480. Its totient is φ = 6144408.

The previous prime is 12971551. The next prime is 12971573. The reversal of 12971566 is 66517921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170641 + ... + 170716.

It is an arithmetic number, because the mean of its divisors is an integer number (2560185).

Almost surely, 2^12971566 is an apocalyptic number.

12971566 is a deficient number, since it is larger than the sum of its proper divisors (7509914).

12971566 is a wasteful number, since it uses less digits than its factorization.

12971566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341378.

The product of its digits is 22680, while the sum is 37.

The square root of 12971566 is about 3601.6060306480. The cubic root of 12971566 is about 234.9619132481.

The spelling of 12971566 in words is "twelve million, nine hundred seventy-one thousand, five hundred sixty-six".