12000649 has 4 divisors (see below), whose sum is σ = 12061764. Its totient is φ = 11939536.

The previous prime is 12000643. The next prime is 12000661. The reversal of 12000649 is 94600021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6969600 + 5031049 = 2640^2 + 2243^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000649 - 2¹¹ = 11998601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12000643) 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 in 3 ways as a sum of consecutive naturals, for example, 30262 + ... + 30655.

It is an arithmetic number, because the mean of its divisors is an integer number (3015441).

Almost surely, 2^12000649 is an apocalyptic number.

It is an amenable number.

12000649 is a deficient number, since it is larger than the sum of its proper divisors (61115).

12000649 is an equidigital number, since it uses as much as digits as its factorization.

12000649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61114.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12000649 is about 3464.1952889524. The cubic root of 12000649 is about 228.9469757671.

The spelling of 12000649 in words is "twelve million, six hundred forty-nine", and thus it is an aban number.