12912566 has 4 divisors (see below), whose sum is σ = 19368852. Its totient is φ = 6456282.

The previous prime is 12912553. The next prime is 12912577. The reversal of 12912566 is 66521921.

It is a happy number.

12912566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66521921 = 97 ⋅685793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228140 + ... + 3228143.

It is an arithmetic number, because the mean of its divisors is an integer number (4842213).

Almost surely, 2^12912566 is an apocalyptic number.

12912566 is a deficient number, since it is larger than the sum of its proper divisors (6456286).

12912566 is an equidigital number, since it uses as much as digits as its factorization.

12912566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6456285.

The product of its digits is 6480, while the sum is 32.

The square root of 12912566 is about 3593.4059052659. The cubic root of 12912566 is about 234.6051374103.

The spelling of 12912566 in words is "twelve million, nine hundred twelve thousand, five hundred sixty-six".