12208558 has 4 divisors (see below), whose sum is σ = 18312840. Its totient is φ = 6104278.

The previous prime is 12208549. The next prime is 12208571. The reversal of 12208558 is 85580221.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3052138 + ... + 3052141.

It is an arithmetic number, because the mean of its divisors is an integer number (4578210).

Almost surely, 2^12208558 is an apocalyptic number.

12208558 is a deficient number, since it is larger than the sum of its proper divisors (6104282).

12208558 is an equidigital number, since it uses as much as digits as its factorization.

12208558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104281.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 12208558 is about 3494.0746986863. The cubic root of 12208558 is about 230.2615675738.

Adding to 12208558 its reverse (85580221), we get a palindrome (97788779).

The spelling of 12208558 in words is "twelve million, two hundred eight thousand, five hundred fifty-eight".