12318556 has 12 divisors (see below), whose sum is σ = 21582792. Its totient is φ = 6152048.

The previous prime is 12318539. The next prime is 12318569. The reversal of 12318556 is 65581321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4371 + ... + 6613.

It is an arithmetic number, because the mean of its divisors is an integer number (1798566).

Almost surely, 2^12318556 is an apocalyptic number.

It is an amenable number.

12318556 is a deficient number, since it is larger than the sum of its proper divisors (9264236).

12318556 is a wasteful number, since it uses less digits than its factorization.

12318556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620 (or 3618 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 12318556 is about 3509.7800500886. The cubic root of 12318556 is about 230.9510462658.

Adding to 12318556 its reverse (65581321), we get a palindrome (77899877).

The spelling of 12318556 in words is "twelve million, three hundred eighteen thousand, five hundred fifty-six".