12555280 has 20 divisors (see below), whose sum is σ = 29191212. Its totient is φ = 5022080.

The previous prime is 12555241. The next prime is 12555281. The reversal of 12555280 is 8255521.

It can be written as a sum of positive squares in 2 ways, for example, as 5308416 + 7246864 = 2304^2 + 2692^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (12555281) 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 in 3 ways as a sum of consecutive naturals, for example, 78391 + ... + 78550.

Almost surely, 2^12555280 is an apocalyptic number.

12555280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12555280 is an abundant number, since it is smaller than the sum of its proper divisors (16635932).

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

12555280 is a wasteful number, since it uses less digits than its factorization.

12555280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156954 (or 156948 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 12555280 is about 3543.3430542356. The cubic root of 12555280 is about 232.4210546324.

The spelling of 12555280 in words is "twelve million, five hundred fifty-five thousand, two hundred eighty".