12217925 has 6 divisors (see below), whose sum is σ = 15150258. Its totient is φ = 9774320.

The previous prime is 12217913. The next prime is 12217939. The reversal of 12217925 is 52971221.

It can be written as a sum of positive squares in 3 ways, for example, as 2719201 + 9498724 = 1649^2 + 3082^2 .

It is not a de Polignac number, because 12217925 - 2⁶ = 12217861 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 244334 + ... + 244383.

It is an arithmetic number, because the mean of its divisors is an integer number (2525043).

Almost surely, 2^12217925 is an apocalyptic number.

It is an amenable number.

12217925 is a deficient number, since it is larger than the sum of its proper divisors (2932333).

12217925 is an equidigital number, since it uses as much as digits as its factorization.

12217925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488727 (or 488722 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 12217925 is about 3495.4148537763. The cubic root of 12217925 is about 230.3204418138.

The spelling of 12217925 in words is "twelve million, two hundred seventeen thousand, nine hundred twenty-five".