12172266 has 24 divisors (see below), whose sum is σ = 26497380. Its totient is φ = 4038336.

The previous prime is 12172253. The next prime is 12172271. The reversal of 12172266 is 66227121.

It can be written as a sum of positive squares in 2 ways, for example, as 10055241 + 2117025 = 3171^2 + 1455^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2646 + ... + 5598.

Almost surely, 2^12172266 is an apocalyptic number.

12172266 is an abundant number, since it is smaller than the sum of its proper divisors (14325114).

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

12172266 is a wasteful number, since it uses less digits than its factorization.

12172266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190 (or 3187 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12172266 is about 3488.8774699035. The cubic root of 12172266 is about 230.0331773186.

Adding to 12172266 its reverse (66227121), we get a palindrome (78399387).

The spelling of 12172266 in words is "twelve million, one hundred seventy-two thousand, two hundred sixty-six".