12005648 has 10 divisors (see below), whose sum is σ = 23260974. Its totient is φ = 6002816.

The previous prime is 12005641. The next prime is 12005659. The reversal of 12005648 is 84650021.

It can be written as a sum of positive squares in only one way, i.e., 6091024 + 5914624 = 2468^2 + 2432^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12005641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 375161 + ... + 375192.

Almost surely, 2^12005648 is an apocalyptic number.

It is an amenable number.

12005648 is a deficient number, since it is larger than the sum of its proper divisors (11255326).

12005648 is an equidigital number, since it uses as much as digits as its factorization.

12005648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750361 (or 750355 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 12005648 is about 3464.9167378164. The cubic root of 12005648 is about 228.9787614660.

Adding to 12005648 its reverse (84650021), we get a palindrome (96655669).

The spelling of 12005648 in words is "twelve million, five thousand, six hundred forty-eight".