2172266 has 4 divisors (see below), whose sum is σ = 3258402. Its totient is φ = 1086132.

The previous prime is 2172257. The next prime is 2172283. The reversal of 2172266 is 6622712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1371241 + 801025 = 1171^2 + 895^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543065 + ... + 543068.

2^2172266 is an apocalyptic number.

2172266 is a deficient number, since it is larger than the sum of its proper divisors (1086136).

2172266 is a wasteful number, since it uses less digits than its factorization.

2172266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086135.

The product of its digits is 2016, while the sum is 26.

The square root of 2172266 is about 1473.8609160976. The cubic root of 2172266 is about 129.5103076126.

Adding to 2172266 its reverse (6622712), we get a palindrome (8794978).

The spelling of 2172266 in words is "two million, one hundred seventy-two thousand, two hundred sixty-six".