12109648 has 10 divisors (see below), whose sum is σ = 23462474. Its totient is φ = 6054816.

The previous prime is 12109633. The next prime is 12109649. The reversal of 12109648 is 84690121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10837264 + 1272384 = 3292^2 + 1128^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12109649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378411 + ... + 378442.

Almost surely, 2^12109648 is an apocalyptic number.

It is an amenable number.

12109648 is a deficient number, since it is larger than the sum of its proper divisors (11352826).

12109648 is an equidigital number, since it uses as much as digits as its factorization.

12109648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756861 (or 756855 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12109648 is about 3479.8919523456. The cubic root of 12109648 is about 229.6380444187.

Adding to 12109648 its reverse (84690121), we get a palindrome (96799769).

The spelling of 12109648 in words is "twelve million, one hundred nine thousand, six hundred forty-eight".