12878647 has 4 divisors (see below), whose sum is σ = 12899320. Its totient is φ = 12857976.

The previous prime is 12878603. The next prime is 12878669. The reversal of 12878647 is 74687821.

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

It is a cyclic number.

It is not a de Polignac number, because 12878647 - 2⁷ = 12878519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9372 + ... + 10657.

It is an arithmetic number, because the mean of its divisors is an integer number (3224830).

Almost surely, 2^12878647 is an apocalyptic number.

12878647 is a deficient number, since it is larger than the sum of its proper divisors (20673).

12878647 is an equidigital number, since it uses as much as digits as its factorization.

12878647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20672.

The product of its digits is 150528, while the sum is 43.

The square root of 12878647 is about 3588.6831846793. The cubic root of 12878647 is about 234.3995353751.

The spelling of 12878647 in words is "twelve million, eight hundred seventy-eight thousand, six hundred forty-seven".