12555018 has 24 divisors (see below), whose sum is σ = 31088928. Its totient is φ = 3587112.

The previous prime is 12554981. The next prime is 12555041. The reversal of 12555018 is 81055521.

It is a junction number, because it is equal to n+sod(n) for n = 12554982 and 12555000.

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 11 ways as a sum of consecutive naturals, for example, 49696 + ... + 49947.

It is an arithmetic number, because the mean of its divisors is an integer number (1295372).

Almost surely, 2^12555018 is an apocalyptic number.

12555018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12555018 is an abundant number, since it is smaller than the sum of its proper divisors (18533910).

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

12555018 is a wasteful number, since it uses less digits than its factorization.

12555018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99658 (or 99655 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 12555018 is about 3543.3060833069. The cubic root of 12555018 is about 232.4194379224.

The spelling of 12555018 in words is "twelve million, five hundred fifty-five thousand, eighteen".