12217752 has 24 divisors (see below), whose sum is σ = 33089940. Its totient is φ = 4072560.

The previous prime is 12217717. The next prime is 12217753. The reversal of 12217752 is 25771221.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217753) by changing a digit.

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, 84774 + ... + 84917.

Almost surely, 2^12217752 is an apocalyptic number.

12217752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12217752 is an abundant number, since it is smaller than the sum of its proper divisors (20872188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12217752 is a wasteful number, since it uses less digits than its factorization.

12217752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169703 (or 169696 counting only the distinct ones).

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

The square root of 12217752 is about 3495.3901069838. The cubic root of 12217752 is about 230.3193547328.

Adding to 12217752 its reverse (25771221), we get a palindrome (37988973).

The spelling of 12217752 in words is "twelve million, two hundred seventeen thousand, seven hundred fifty-two".