12643562 has 8 divisors (see below), whose sum is σ = 19161156. Its totient is φ = 6256512.

The previous prime is 12643549. The next prime is 12643571. The reversal of 12643562 is 26534621.

12643562 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10686361 + 1957201 = 3269^2 + 1399^2 .

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

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, 32393 + ... + 32780.

Almost surely, 2^12643562 is an apocalyptic number.

12643562 is a deficient number, since it is larger than the sum of its proper divisors (6517594).

12643562 is an equidigital number, since it uses as much as digits as its factorization.

12643562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65272.

The product of its digits is 8640, while the sum is 29.

The square root of 12643562 is about 3555.7786770270. The cubic root of 12643562 is about 232.9645362224.

The spelling of 12643562 in words is "twelve million, six hundred forty-three thousand, five hundred sixty-two".