12642226 has 8 divisors (see below), whose sum is σ = 19787904. Its totient is φ = 6046260.

The previous prime is 12642211. The next prime is 12642263. The reversal of 12642226 is 62224621.

12642226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12642226.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137370 + ... + 137461.

It is an arithmetic number, because the mean of its divisors is an integer number (2473488).

Almost surely, 2^12642226 is an apocalyptic number.

12642226 is a deficient number, since it is larger than the sum of its proper divisors (7145678).

12642226 is a wasteful number, since it uses less digits than its factorization.

12642226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274856.

The product of its digits is 2304, while the sum is 25.

The square root of 12642226 is about 3555.5908088530. The cubic root of 12642226 is about 232.9563304234.

Adding to 12642226 its reverse (62224621), we get a palindrome (74866847).

The spelling of 12642226 in words is "twelve million, six hundred forty-two thousand, two hundred twenty-six".