12129851 has 2 divisors, whose sum is σ = 12129852. Its totient is φ = 12129850.

The previous prime is 12129829. The next prime is 12129863. The reversal of 12129851 is 15892121.

12129851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12129851 - 2¹⁰ = 12128827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12129811) 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, 6064925 + 6064926.

It is an arithmetic number, because the mean of its divisors is an integer number (6064926).

Almost surely, 2^12129851 is an apocalyptic number.

12129851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129851 is an equidigital number, since it uses as much as digits as its factorization.

12129851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 29.

The square root of 12129851 is about 3482.7935626448. The cubic root of 12129851 is about 229.7656781804.

The spelling of 12129851 in words is "twelve million, one hundred twenty-nine thousand, eight hundred fifty-one".