12120929 has 2 divisors, whose sum is σ = 12120930. Its totient is φ = 12120928.

The previous prime is 12120919. The next prime is 12120947. The reversal of 12120929 is 92902121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 5870929 = 2500^2 + 2423^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120929 - 2⁸ = 12120673 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12120898 and 12120907.

It is not a weakly prime, because it can be changed into another prime (12120919) 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, 6060464 + 6060465.

It is an arithmetic number, because the mean of its divisors is an integer number (6060465).

Almost surely, 2^12120929 is an apocalyptic number.

It is an amenable number.

12120929 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120929 is an equidigital number, since it uses as much as digits as its factorization.

12120929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12120929 is about 3481.5124586880. The cubic root of 12120929 is about 229.7093303545.

The spelling of 12120929 in words is "twelve million, one hundred twenty thousand, nine hundred twenty-nine".