12171152 has 40 divisors (see below), whose sum is σ = 27117312. Its totient is φ = 5184000.

The previous prime is 12171151. The next prime is 12171161. The reversal of 12171152 is 25117121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171151) 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 7 ways as a sum of consecutive naturals, for example, 30152 + ... + 30552.

Almost surely, 2^12171152 is an apocalyptic number.

It is an amenable number.

12171152 is an abundant number, since it is smaller than the sum of its proper divisors (14946160).

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

12171152 is a wasteful number, since it uses less digits than its factorization.

12171152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 681 counting only the distinct ones).

The product of its digits is 140, while the sum is 20.

The square root of 12171152 is about 3488.7178160465. The cubic root of 12171152 is about 230.0261595955.

Adding to 12171152 its reverse (25117121), we get a palindrome (37288273).

The spelling of 12171152 in words is "twelve million, one hundred seventy-one thousand, one hundred fifty-two".