12078172 has 12 divisors (see below), whose sum is σ = 21172536. Its totient is φ = 6028880.

The previous prime is 12078161. The next prime is 12078173. The reversal of 12078172 is 27187021.

It is a super-3 number, since 3×12078172³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12078172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12078173) 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, 522 + ... + 4942.

It is an arithmetic number, because the mean of its divisors is an integer number (1764378).

Almost surely, 2^12078172 is an apocalyptic number.

It is an amenable number.

12078172 is a deficient number, since it is larger than the sum of its proper divisors (9094364).

12078172 is a wasteful number, since it uses less digits than its factorization.

12078172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108 (or 5106 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 12078172 is about 3475.3664554979. The cubic root of 12078172 is about 229.4389095724.

The spelling of 12078172 in words is "twelve million, seventy-eight thousand, one hundred seventy-two".