12012660 has 72 divisors (see below), whose sum is σ = 39757536. Its totient is φ = 2911680.

The previous prime is 12012643. The next prime is 12012677. The reversal of 12012660 is 6621021.

It is a happy number.

12012660 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 2 + 660 = 666.

It is an interprime number because it is at equal distance from previous prime (12012643) and next prime (12012677).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1054 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (552188).

Almost surely, 2^12012660 is an apocalyptic number.

12012660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12012660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19878768).

12012660 is an abundant number, since it is smaller than the sum of its proper divisors (27744876).

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

12012660 is a wasteful number, since it uses less digits than its factorization.

12012660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6093 (or 6088 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12012660 is about 3465.9284470398. The cubic root of 12012660 is about 229.0233317824.

Adding to 12012660 its reverse (6621021), we get a palindrome (18633681).

The spelling of 12012660 in words is "twelve million, twelve thousand, six hundred sixty".