12217625 has 16 divisors (see below), whose sum is σ = 17427072. Its totient is φ = 8377200.

The previous prime is 12217619. The next prime is 12217637. The reversal of 12217625 is 52671221.

It is a de Polignac number, because none of the positive numbers 2^k-12217625 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12217594 and 12217603.

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 15 ways as a sum of consecutive naturals, for example, 6107 + ... + 7856.

It is an arithmetic number, because the mean of its divisors is an integer number (1089192).

Almost surely, 2^12217625 is an apocalyptic number.

It is an amenable number.

12217625 is a deficient number, since it is larger than the sum of its proper divisors (5209447).

12217625 is an equidigital number, since it uses as much as digits as its factorization.

12217625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13985 (or 13975 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 12217625 is about 3495.3719401517. The cubic root of 12217625 is about 230.3185566956.

Adding to 12217625 its reverse (52671221), we get a palindrome (64888846).

The spelling of 12217625 in words is "twelve million, two hundred seventeen thousand, six hundred twenty-five".