2162091 has 4 divisors (see below), whose sum is σ = 2882792. Its totient is φ = 1441392.

The previous prime is 2162089. The next prime is 2162113. The reversal of 2162091 is 1902612.

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

It is not a de Polignac number, because 2162091 - 2¹ = 2162089 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2162071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360346 + ... + 360351.

It is an arithmetic number, because the mean of its divisors is an integer number (720698).

2^2162091 is an apocalyptic number.

2162091 is a deficient number, since it is larger than the sum of its proper divisors (720701).

2162091 is an equidigital number, since it uses as much as digits as its factorization.

2162091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720700.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 2162091 is about 1470.4050462373. The cubic root of 2162091 is about 129.3077801986.

The spelling of 2162091 in words is "two million, one hundred sixty-two thousand, ninety-one".