2167081 has 4 divisors (see below), whose sum is σ = 2476672. Its totient is φ = 1857492.

The previous prime is 2167079. The next prime is 2167091. The reversal of 2167081 is 1807612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2167081 - 2¹ = 2167079 is a prime.

It is a super-2 number, since 2×2167081² = 9392480121122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2167021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154785 + ... + 154798.

It is an arithmetic number, because the mean of its divisors is an integer number (619168).

2^2167081 is an apocalyptic number.

It is an amenable number.

2167081 is a deficient number, since it is larger than the sum of its proper divisors (309591).

2167081 is an equidigital number, since it uses as much as digits as its factorization.

2167081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309590.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2167081 is about 1472.1008796954. The cubic root of 2167081 is about 129.4071824378.

The spelling of 2167081 in words is "two million, one hundred sixty-seven thousand, eighty-one".