12340172 has 24 divisors (see below), whose sum is σ = 23362416. Its totient is φ = 5669568.

The previous prime is 12340171. The next prime is 12340193. The reversal of 12340172 is 27104321.

It is not an unprimeable number, because it can be changed into a prime (12340171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15578 + ... + 16350.

It is an arithmetic number, because the mean of its divisors is an integer number (973434).

Almost surely, 2^12340172 is an apocalyptic number.

It is an amenable number.

12340172 is a deficient number, since it is larger than the sum of its proper divisors (11022244).

12340172 is a wasteful number, since it uses less digits than its factorization.

12340172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 12340172 is about 3512.8580956253. The cubic root of 12340172 is about 231.0860545307.

Adding to 12340172 its reverse (27104321), we get a palindrome (39444493).

The spelling of 12340172 in words is "twelve million, three hundred forty thousand, one hundred seventy-two".