12657851 has 2 divisors, whose sum is σ = 12657852. Its totient is φ = 12657850.

The previous prime is 12657817. The next prime is 12657859. The reversal of 12657851 is 15875621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12657851 - 2¹⁸ = 12395707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12657859) 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, 6328925 + 6328926.

It is an arithmetic number, because the mean of its divisors is an integer number (6328926).

Almost surely, 2^12657851 is an apocalyptic number.

12657851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12657851 is an equidigital number, since it uses as much as digits as its factorization.

12657851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 35.

The square root of 12657851 is about 3557.7873741976. The cubic root of 12657851 is about 233.0522640591.

The spelling of 12657851 in words is "twelve million, six hundred fifty-seven thousand, eight hundred fifty-one".