12643297 has 4 divisors (see below), whose sum is σ = 12653316. Its totient is φ = 12633280.

The previous prime is 12643283. The next prime is 12643313. The reversal of 12643297 is 79234621.

12643297 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 a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8579041 + 4064256 = 2929^2 + 2016^2 .

It is a cyclic number.

It is not a de Polignac number, because 12643297 - 2¹¹ = 12641249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12640297) 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, 2788 + ... + 5749.

It is an arithmetic number, because the mean of its divisors is an integer number (3163329).

Almost surely, 2^12643297 is an apocalyptic number.

It is an amenable number.

12643297 is a deficient number, since it is larger than the sum of its proper divisors (10019).

12643297 is an equidigital number, since it uses as much as digits as its factorization.

12643297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018.

The product of its digits is 18144, while the sum is 34.

The square root of 12643297 is about 3555.7414135451. The cubic root of 12643297 is about 232.9629086211.

The spelling of 12643297 in words is "twelve million, six hundred forty-three thousand, two hundred ninety-seven".