12217725 has 36 divisors (see below), whose sum is σ = 23572276. Its totient is φ = 6013440.

The previous prime is 12217717. The next prime is 12217753. The reversal of 12217725 is 52771221.

It can be written as a sum of positive squares in 6 ways, for example, as 86436 + 12131289 = 294^2 + 3483^2 .

It is not a de Polignac number, because 12217725 - 2³ = 12217717 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 837 + ... + 5013.

Almost surely, 2^12217725 is an apocalyptic number.

12217725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12217725 is a deficient number, since it is larger than the sum of its proper divisors (11354551).

12217725 is a wasteful number, since it uses less digits than its factorization.

12217725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206 (or 4198 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 12217725 is about 3495.3862447518. The cubic root of 12217725 is about 230.3191850718.

Adding to 12217725 its reverse (52771221), we get a palindrome (64988946).

The spelling of 12217725 in words is "twelve million, two hundred seventeen thousand, seven hundred twenty-five".