12172230 has 72 divisors (see below), whose sum is σ = 36430992. Its totient is φ = 2762208.

The previous prime is 12172219. The next prime is 12172253. The reversal of 12172230 is 3227121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87501 + ... + 87639.

It is an arithmetic number, because the mean of its divisors is an integer number (505986).

Almost surely, 2^12172230 is an apocalyptic number.

12172230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12172230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18215496).

12172230 is an abundant number, since it is smaller than the sum of its proper divisors (24258762).

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

12172230 is a wasteful number, since it uses less digits than its factorization.

12172230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12172230 is about 3488.8723106471. The cubic root of 12172230 is about 230.0329505407.

Adding to 12172230 its reverse (3227121), we get a palindrome (15399351).

The spelling of 12172230 in words is "twelve million, one hundred seventy-two thousand, two hundred thirty".