2167281 has 12 divisors (see below), whose sum is σ = 3146052. Its totient is φ = 1437696.

The previous prime is 2167261. The next prime is 2167289. The reversal of 2167281 is 1827612.

It can be written as a sum of positive squares in 2 ways, for example, as 1199025 + 968256 = 1095^2 + 984^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2167281 is a prime.

It is a super-2 number, since 2×2167281² = 9394213865922, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2167289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1845 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (262171).

2^2167281 is an apocalyptic number.

It is an amenable number.

2167281 is a deficient number, since it is larger than the sum of its proper divisors (978771).

2167281 is a wasteful number, since it uses less digits than its factorization.

2167281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200 (or 1197 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2167281 is about 1472.1688082554. The cubic root of 2167281 is about 129.4111633135.

The spelling of 2167281 in words is "two million, one hundred sixty-seven thousand, two hundred eighty-one".