12144280 has 32 divisors (see below), whose sum is σ = 27705600. Its totient is φ = 4790016.

The previous prime is 12144263. The next prime is 12144289. The reversal of 12144280 is 8244121.

12144280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841 + ... + 4999.

It is an arithmetic number, because the mean of its divisors is an integer number (865800).

Almost surely, 2^12144280 is an apocalyptic number.

12144280 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 12144280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13852800).

12144280 is an abundant number, since it is smaller than the sum of its proper divisors (15561320).

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

12144280 is a wasteful number, since it uses less digits than its factorization.

12144280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243 (or 4239 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 12144280 is about 3484.8644163009. The cubic root of 12144280 is about 229.8567475947.

The spelling of 12144280 in words is "twelve million, one hundred forty-four thousand, two hundred eighty".