12013172 has 12 divisors (see below), whose sum is σ = 21311556. Its totient is φ = 5924160.

The previous prime is 12013117. The next prime is 12013189. The reversal of 12013172 is 27131021.

It can be written as a sum of positive squares in 2 ways, for example, as 6832996 + 5180176 = 2614^2 + 2276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12013172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20279 + ... + 20862.

It is an arithmetic number, because the mean of its divisors is an integer number (1775963).

Almost surely, 2^12013172 is an apocalyptic number.

It is an amenable number.

12013172 is a deficient number, since it is larger than the sum of its proper divisors (9298384).

12013172 is a wasteful number, since it uses less digits than its factorization.

12013172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41218 (or 41216 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12013172 is about 3466.0023081354. The cubic root of 12013172 is about 229.0265855242.

Adding to 12013172 its reverse (27131021), we get a palindrome (39144193).

The spelling of 12013172 in words is "twelve million, thirteen thousand, one hundred seventy-two".