12171288 has 16 divisors (see below), whose sum is σ = 30428280. Its totient is φ = 4057088.

The previous prime is 12171283. The next prime is 12171307. The reversal of 12171288 is 88217121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171283) 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 3 ways as a sum of consecutive naturals, for example, 253545 + ... + 253592.

Almost surely, 2^12171288 is an apocalyptic number.

It is an amenable number.

12171288 is an abundant number, since it is smaller than the sum of its proper divisors (18256992).

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

12171288 is a wasteful number, since it uses less digits than its factorization.

12171288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507146 (or 507142 counting only the distinct ones).

The product of its digits is 1792, while the sum is 30.

The square root of 12171288 is about 3488.7373073936. The cubic root of 12171288 is about 230.0270163602.

The spelling of 12171288 in words is "twelve million, one hundred seventy-one thousand, two hundred eighty-eight".