12109712 has 30 divisors (see below), whose sum is σ = 24961014. Its totient is φ = 5671680.

The previous prime is 12109697. The next prime is 12109817. The reversal of 12109712 is 21790121.

It can be written as a sum of positive squares in only one way, i.e., 11397376 + 712336 = 3376^2 + 844^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 57287 + ... + 57497.

Almost surely, 2^12109712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12109712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12480507).

12109712 is an abundant number, since it is smaller than the sum of its proper divisors (12851302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12109712 is an equidigital number, since it uses as much as digits as its factorization.

12109712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 12109712 is about 3479.9011480213. The cubic root of 12109712 is about 229.6384489669.

Adding to 12109712 its reverse (21790121), we get a palindrome (33899833).

It can be divided in two parts, 12109 and 712, that added together give a palindrome (12821).

The spelling of 12109712 in words is "twelve million, one hundred nine thousand, seven hundred twelve".