12009712 has 80 divisors (see below), whose sum is σ = 28435680. Its totient is φ = 4838400.

The previous prime is 12009707. The next prime is 12009727. The reversal of 12009712 is 21790021.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 66262 + ... + 66442.

It is an arithmetic number, because the mean of its divisors is an integer number (355446).

Almost surely, 2^12009712 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 12009712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14217840).

12009712 is an abundant number, since it is smaller than the sum of its proper divisors (16425968).

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

12009712 is a wasteful number, since it uses less digits than its factorization.

12009712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 12009712 is about 3465.5031380739. The cubic root of 12009712 is about 229.0045955486.

Adding to 12009712 its reverse (21790021), we get a palindrome (33799733).

It can be divided in two parts, 12009 and 712, that added together give a palindrome (12721).

The spelling of 12009712 in words is "twelve million, nine thousand, seven hundred twelve".