12688547 has 2 divisors, whose sum is σ = 12688548. Its totient is φ = 12688546.

The previous prime is 12688531. The next prime is 12688553. The reversal of 12688547 is 74588621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12688547 - 2⁴ = 12688531 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12688567) 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 as a sum of consecutive naturals, namely, 6344273 + 6344274.

It is an arithmetic number, because the mean of its divisors is an integer number (6344274).

Almost surely, 2^12688547 is an apocalyptic number.

12688547 is a deficient number, since it is larger than the sum of its proper divisors (1).

12688547 is an equidigital number, since it uses as much as digits as its factorization.

12688547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 41.

The square root of 12688547 is about 3562.0986791497. The cubic root of 12688547 is about 233.2405002589.

The spelling of 12688547 in words is "twelve million, six hundred eighty-eight thousand, five hundred forty-seven".