2071091 has 4 divisors (see below), whose sum is σ = 2259384. Its totient is φ = 1882800.

The previous prime is 2071087. The next prime is 2071123. The reversal of 2071091 is 1901702.

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

It is a cyclic number.

It is not a de Polignac number, because 2071091 - 2² = 2071087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2071291) 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, 94130 + ... + 94151.

It is an arithmetic number, because the mean of its divisors is an integer number (564846).

2^2071091 is an apocalyptic number.

2071091 is a deficient number, since it is larger than the sum of its proper divisors (188293).

2071091 is a wasteful number, since it uses less digits than its factorization.

2071091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188292.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 2071091 is about 1439.1285557587. The cubic root of 2071091 is about 127.4675760176.

Adding to 2071091 its reverse (1901702), we get a palindrome (3972793).

The spelling of 2071091 in words is "two million, seventy-one thousand, ninety-one".