12215606 has 16 divisors (see below), whose sum is σ = 19958400. Its totient is φ = 5573568.

The previous prime is 12215591. The next prime is 12215611. The reversal of 12215606 is 60651221.

It is a plaindrome in base 15.

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 in 7 ways as a sum of consecutive naturals, for example, 326 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (1247400).

Almost surely, 2^12215606 is an apocalyptic number.

12215606 is a deficient number, since it is larger than the sum of its proper divisors (7742794).

12215606 is a wasteful number, since it uses less digits than its factorization.

12215606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12215606 is about 3495.0831177527. The cubic root of 12215606 is about 230.3058690475.

Adding to 12215606 its reverse (60651221), we get a palindrome (72866827).

It can be divided in two parts, 12215 and 606, that added together give a palindrome (12821).

The spelling of 12215606 in words is "twelve million, two hundred fifteen thousand, six hundred six".