12127980 has 48 divisors (see below), whose sum is σ = 34239744. Its totient is φ = 3207360.

The previous prime is 12127967. The next prime is 12127991. The reversal of 12127980 is 8972121.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 7089 + ... + 8631.

It is an arithmetic number, because the mean of its divisors is an integer number (713328).

Almost surely, 2^12127980 is an apocalyptic number.

12127980 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 12127980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17119872).

12127980 is an abundant number, since it is smaller than the sum of its proper divisors (22111764).

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

12127980 is a wasteful number, since it uses less digits than its factorization.

12127980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 12127980 is about 3482.5249460700. The cubic root of 12127980 is about 229.7538639740.

The spelling of 12127980 in words is "twelve million, one hundred twenty-seven thousand, nine hundred eighty".