12103172 has 6 divisors (see below), whose sum is σ = 21180558. Its totient is φ = 6051584.

The previous prime is 12103163. The next prime is 12103207. The reversal of 12103172 is 27130121.

It can be written as a sum of positive squares in only one way, i.e., 11930116 + 173056 = 3454^2 + 416^2 .

It is a super-3 number, since 3×12103172³ (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 12103172.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1512893 + ... + 1512900.

It is an arithmetic number, because the mean of its divisors is an integer number (3530093).

Almost surely, 2^12103172 is an apocalyptic number.

It is an amenable number.

12103172 is a deficient number, since it is larger than the sum of its proper divisors (9077386).

12103172 is a wasteful number, since it uses less digits than its factorization.

12103172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025797 (or 3025795 counting only the distinct ones).

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

The square root of 12103172 is about 3478.9613392506. The cubic root of 12103172 is about 229.5971018262.

Adding to 12103172 its reverse (27130121), we get a palindrome (39233293).

The spelling of 12103172 in words is "twelve million, one hundred three thousand, one hundred seventy-two".