12856378 has 4 divisors (see below), whose sum is σ = 19284570. Its totient is φ = 6428188.

The previous prime is 12856373. The next prime is 12856387. The reversal of 12856378 is 87365821.

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., 6985449 + 5870929 = 2643^2 + 2423^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 12856378.

It is not an unprimeable number, because it can be changed into a prime (12856373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214093 + ... + 3214096.

Almost surely, 2^12856378 is an apocalyptic number.

12856378 is a deficient number, since it is larger than the sum of its proper divisors (6428192).

12856378 is an equidigital number, since it uses as much as digits as its factorization.

12856378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428191.

The product of its digits is 80640, while the sum is 40.

The square root of 12856378 is about 3585.5791721840. The cubic root of 12856378 is about 234.2643541261.

The spelling of 12856378 in words is "twelve million, eight hundred fifty-six thousand, three hundred seventy-eight".