12868642 has 4 divisors (see below), whose sum is σ = 19302966. Its totient is φ = 6434320.

The previous prime is 12868613. The next prime is 12868651. The reversal of 12868642 is 24686821.

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

It can be written as a sum of positive squares in only one way, i.e., 6713281 + 6155361 = 2591^2 + 2481^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3217159 + ... + 3217162.

Almost surely, 2^12868642 is an apocalyptic number.

12868642 is a deficient number, since it is larger than the sum of its proper divisors (6434324).

12868642 is an equidigital number, since it uses as much as digits as its factorization.

12868642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6434323.

The product of its digits is 36864, while the sum is 37.

The square root of 12868642 is about 3587.2889484958. The cubic root of 12868642 is about 234.3388205369.

The spelling of 12868642 in words is "twelve million, eight hundred sixty-eight thousand, six hundred forty-two".