12724172 has 6 divisors (see below), whose sum is σ = 22267308. Its totient is φ = 6362084.

The previous prime is 12724163. The next prime is 12724181. The reversal of 12724172 is 27142721.

It is an interprime number because it is at equal distance from previous prime (12724163) and next prime (12724181).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1590518 + ... + 1590525.

It is an arithmetic number, because the mean of its divisors is an integer number (3711218).

Almost surely, 2^12724172 is an apocalyptic number.

It is an amenable number.

12724172 is a deficient number, since it is larger than the sum of its proper divisors (9543136).

12724172 is a wasteful number, since it uses less digits than its factorization.

12724172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181047 (or 3181045 counting only the distinct ones).

The product of its digits is 1568, while the sum is 26.

The square root of 12724172 is about 3567.0957374312. The cubic root of 12724172 is about 233.4585821899.

Adding to 12724172 its reverse (27142721), we get a palindrome (39866893).

The spelling of 12724172 in words is "twelve million, seven hundred twenty-four thousand, one hundred seventy-two".