12208642 has 4 divisors (see below), whose sum is σ = 18312966. Its totient is φ = 6104320.

The previous prime is 12208627. The next prime is 12208643. The reversal of 12208642 is 24680221.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 160801 = 3471^2 + 401^2 .

It is a super-4 number, since 4×12208642⁴ (a number of 29 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (12208643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052159 + ... + 3052162.

Almost surely, 2^12208642 is an apocalyptic number.

12208642 is a deficient number, since it is larger than the sum of its proper divisors (6104324).

12208642 is an equidigital number, since it uses as much as digits as its factorization.

12208642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104323.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 12208642 is about 3494.0867190154. The cubic root of 12208642 is about 230.2620956713.

Adding to 12208642 its reverse (24680221), we get a palindrome (36888863).

The spelling of 12208642 in words is "twelve million, two hundred eight thousand, six hundred forty-two".