12011172 has 12 divisors (see below), whose sum is σ = 28026096. Its totient is φ = 4003720.

The previous prime is 12011171. The next prime is 12011177. The reversal of 12011172 is 27111021.

12011172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (12011171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500454 + ... + 500477.

It is an arithmetic number, because the mean of its divisors is an integer number (2335508).

Almost surely, 2^12011172 is an apocalyptic number.

12011172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12011172 is an abundant number, since it is smaller than the sum of its proper divisors (16014924).

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

12011172 is a wasteful number, since it uses less digits than its factorization.

12011172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000938 (or 1000936 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 12011172 is about 3465.7137792957. The cubic root of 12011172 is about 229.0138750706.

Adding to 12011172 its reverse (27111021), we get a palindrome (39122193).

The spelling of 12011172 in words is "twelve million, eleven thousand, one hundred seventy-two".