12408172 has 72 divisors (see below), whose sum is σ = 27291600. Its totient is φ = 4910976.

The previous prime is 12408169. The next prime is 12408203. The reversal of 12408172 is 27180421.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210279 + ... + 210337.

It is an arithmetic number, because the mean of its divisors is an integer number (379050).

Almost surely, 2^12408172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12408172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13645800).

12408172 is an abundant number, since it is smaller than the sum of its proper divisors (14883428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12408172 is a wasteful number, since it uses less digits than its factorization.

12408172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12408172 is about 3522.5235272458. The cubic root of 12408172 is about 231.5097405819.

Adding to 12408172 its reverse (27180421), we get a palindrome (39588593).

The spelling of 12408172 in words is "twelve million, four hundred eight thousand, one hundred seventy-two".