12280144 has 10 divisors (see below), whose sum is σ = 23792810. Its totient is φ = 6140064.

The previous prime is 12280141. The next prime is 12280157. The reversal of 12280144 is 44108221.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 169744 = 3480^2 + 412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12280141) by changing a digit.

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 as a sum of consecutive naturals, namely, 383739 + ... + 383770.

It is an arithmetic number, because the mean of its divisors is an integer number (2379281).

Almost surely, 2^12280144 is an apocalyptic number.

It is an amenable number.

12280144 is a deficient number, since it is larger than the sum of its proper divisors (11512666).

12280144 is an equidigital number, since it uses as much as digits as its factorization.

12280144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767517 (or 767511 counting only the distinct ones).

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

The square root of 12280144 is about 3504.3036398121. The cubic root of 12280144 is about 230.7107440614.

Adding to 12280144 its reverse (44108221), we get a palindrome (56388365).

The spelling of 12280144 in words is "twelve million, two hundred eighty thousand, one hundred forty-four".