It is a sphenic number, since it is the product of 3 distinct primes.
12172206 is an admirable number.
It is a Curzon number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 212172206 is an apocalyptic number.
12172206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12172206 is a wasteful number, since it uses less digits than its factorization.
12172206 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2028706.
The square root of 12172206 is about 3488.8688711386. The cubic root of 12172206 is about 230.0327993552.
Adding to 12172206 its reverse (60227121), we get a palindrome (72399327).
The spelling of 12172206 in words is "twelve million, one hundred seventy-two thousand, two hundred six".