12217347 has 12 divisors (see below), whose sum is σ = 18414864. Its totient is φ = 7790640.

The previous prime is 12217333. The next prime is 12217391. The reversal of 12217347 is 74371221.

It is a happy number.

12217347 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12217347 - 2¹² = 12213251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12217347.

It is not an unprimeable number, because it can be changed into a prime (12217327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29304 + ... + 29717.

It is an arithmetic number, because the mean of its divisors is an integer number (1534572).

Almost surely, 2^12217347 is an apocalyptic number.

12217347 is a deficient number, since it is larger than the sum of its proper divisors (6197517).

12217347 is a wasteful number, since it uses less digits than its factorization.

12217347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59050 (or 59047 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 12217347 is about 3495.3321730559. The cubic root of 12217347 is about 230.3168097919.

Adding to 12217347 its reverse (74371221), we get a palindrome (86588568).

The spelling of 12217347 in words is "twelve million, two hundred seventeen thousand, three hundred forty-seven".