12172197 has 8 divisors (see below), whose sum is σ = 16248544. Its totient is φ = 8105328.

The previous prime is 12172189. The next prime is 12172219. The reversal of 12172197 is 79127121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12172197 - 2³ = 12172189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1563 + ... + 5175.

It is an arithmetic number, because the mean of its divisors is an integer number (2031068).

Almost surely, 2^12172197 is an apocalyptic number.

It is an amenable number.

12172197 is a deficient number, since it is larger than the sum of its proper divisors (4076347).

12172197 is a wasteful number, since it uses less digits than its factorization.

12172197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4739.

The product of its digits is 1764, while the sum is 30.

The square root of 12172197 is about 3488.8675813221. The cubic root of 12172197 is about 230.0327426605.

The spelling of 12172197 in words is "twelve million, one hundred seventy-two thousand, one hundred ninety-seven".