12111606 has 72 divisors (see below), whose sum is σ = 29759184. Its totient is φ = 3674160.

The previous prime is 12111601. The next prime is 12111707. The reversal of 12111606 is 60611121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111601) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 170551 + ... + 170621.

It is an arithmetic number, because the mean of its divisors is an integer number (413322).

Almost surely, 2^12111606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12111606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14879592).

12111606 is an abundant number, since it is smaller than the sum of its proper divisors (17647578).

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

12111606 is an frugal number, since it uses more digits than its factorization.

12111606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12111606 is about 3480.1732715484. The cubic root of 12111606 is about 229.6504204200.

Adding to 12111606 its reverse (60611121), we get a palindrome (72722727).

The spelling of 12111606 in words is "twelve million, one hundred eleven thousand, six hundred six".