12878787 has 8 divisors (see below), whose sum is σ = 17349136. Its totient is φ = 8497152.

The previous prime is 12878783. The next prime is 12878839. The reversal of 12878787 is 78787821.

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

It is not a de Polignac number, because 12878787 - 2² = 12878783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12878783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21838 + ... + 22419.

It is an arithmetic number, because the mean of its divisors is an integer number (2168642).

Almost surely, 2^12878787 is an apocalyptic number.

12878787 is a deficient number, since it is larger than the sum of its proper divisors (4470349).

12878787 is an equidigital number, since it uses as much as digits as its factorization.

12878787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44357.

The product of its digits is 351232, while the sum is 48.

The square root of 12878787 is about 3588.7026903883. The cubic root of 12878787 is about 234.4003847350.

The spelling of 12878787 in words is "twelve million, eight hundred seventy-eight thousand, seven hundred eighty-seven".