12656047 has 2 divisors, whose sum is σ = 12656048. Its totient is φ = 12656046.

The previous prime is 12656023. The next prime is 12656051. The reversal of 12656047 is 74065621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12656047 - 2¹¹ = 12653999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12656087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328023 + 6328024.

It is an arithmetic number, because the mean of its divisors is an integer number (6328024).

Almost surely, 2^12656047 is an apocalyptic number.

12656047 is a deficient number, since it is larger than the sum of its proper divisors (1).

12656047 is an equidigital number, since it uses as much as digits as its factorization.

12656047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 12656047 is about 3557.5338368032. The cubic root of 12656047 is about 233.0411919780.

The spelling of 12656047 in words is "twelve million, six hundred fifty-six thousand, forty-seven".