12656251 has 2 divisors, whose sum is σ = 12656252. Its totient is φ = 12656250.

The previous prime is 12656243. The next prime is 12656291. The reversal of 12656251 is 15265621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12656251 - 2³ = 12656243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12656221) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328125 + 6328126.

It is an arithmetic number, because the mean of its divisors is an integer number (6328126).

Almost surely, 2^12656251 is an apocalyptic number.

12656251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12656251 is an equidigital number, since it uses as much as digits as its factorization.

12656251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 12656251 is about 3557.5625082351. The cubic root of 12656251 is about 233.0424440843.

The spelling of 12656251 in words is "twelve million, six hundred fifty-six thousand, two hundred fifty-one".