12172012 has 12 divisors (see below), whose sum is σ = 21326760. Its totient is φ = 6078656.

The previous prime is 12172003. The next prime is 12172019. The reversal of 12172012 is 21027121.

It is a super-2 number, since 2×12172012² = 296315752256288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12172019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3828 + ... + 6244.

It is an arithmetic number, because the mean of its divisors is an integer number (1777230).

Almost surely, 2^12172012 is an apocalyptic number.

It is an amenable number.

12172012 is a deficient number, since it is larger than the sum of its proper divisors (9154748).

12172012 is a wasteful number, since it uses less digits than its factorization.

12172012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680 (or 3678 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12172012 is about 3488.8410683205. The cubic root of 12172012 is about 230.0315772650.

Adding to 12172012 its reverse (21027121), we get a palindrome (33199133).

The spelling of 12172012 in words is "twelve million, one hundred seventy-two thousand, twelve".