12788147 has 4 divisors (see below), whose sum is σ = 12796056. Its totient is φ = 12780240.

The previous prime is 12788129. The next prime is 12788177. The reversal of 12788147 is 74188721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74188721 = 41 ⋅1809481.

It is a cyclic number.

It is not a de Polignac number, because 12788147 - 2¹⁴ = 12771763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12788147.

It is not an unprimeable number, because it can be changed into a prime (12788117) 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, 554 + ... + 5087.

It is an arithmetic number, because the mean of its divisors is an integer number (3199014).

Almost surely, 2^12788147 is an apocalyptic number.

12788147 is a deficient number, since it is larger than the sum of its proper divisors (7909).

12788147 is an equidigital number, since it uses as much as digits as its factorization.

12788147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908.

The product of its digits is 25088, while the sum is 38.

The square root of 12788147 is about 3576.0518732256. The cubic root of 12788147 is about 233.8491917949.

The spelling of 12788147 in words is "twelve million, seven hundred eighty-eight thousand, one hundred forty-seven".