12649001 has 2 divisors, whose sum is σ = 12649002. Its totient is φ = 12649000.

The previous prime is 12648989. The next prime is 12649031. The reversal of 12649001 is 10094621.

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., 11909401 + 739600 = 3451^2 + 860^2 .

It is an emirp because it is prime and its reverse (10094621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12649001 - 2¹⁴ = 12632617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12649031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324500 + 6324501.

It is an arithmetic number, because the mean of its divisors is an integer number (6324501).

Almost surely, 2^12649001 is an apocalyptic number.

It is an amenable number.

12649001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649001 is an equidigital number, since it uses as much as digits as its factorization.

12649001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 12649001 is about 3556.5434061740. The cubic root of 12649001 is about 232.9979369487.

The spelling of 12649001 in words is "twelve million, six hundred forty-nine thousand, one".