2175391 has 2 divisors, whose sum is σ = 2175392. Its totient is φ = 2175390.

The previous prime is 2175373. The next prime is 2175431. The reversal of 2175391 is 1935712.

2175391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2175391 - 2⁷ = 2175263 is a prime.

2175391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2175311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1087695 + 1087696.

It is an arithmetic number, because the mean of its divisors is an integer number (1087696).

2^2175391 is an apocalyptic number.

2175391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2175391 is an equidigital number, since it uses as much as digits as its factorization.

2175391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 28.

The square root of 2175391 is about 1474.9206758331. The cubic root of 2175391 is about 129.5723819306.

The spelling of 2175391 in words is "two million, one hundred seventy-five thousand, three hundred ninety-one".