12051649 has 2 divisors, whose sum is σ = 12051650. Its totient is φ = 12051648.

The previous prime is 12051647. The next prime is 12051659. The reversal of 12051649 is 94615021.

12051649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6411024 + 5640625 = 2532^2 + 2375^2 .

It is an emirp because it is prime and its reverse (94615021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12051649 - 2¹ = 12051647 is a prime.

Together with 12051647, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12051647) 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, 6025824 + 6025825.

It is an arithmetic number, because the mean of its divisors is an integer number (6025825).

Almost surely, 2^12051649 is an apocalyptic number.

It is an amenable number.

12051649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12051649 is an equidigital number, since it uses as much as digits as its factorization.

12051649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 12051649 is about 3471.5485017496. The cubic root of 12051649 is about 229.2708414230.

The spelling of 12051649 in words is "twelve million, fifty-one thousand, six hundred forty-nine".