4085791 has 2 divisors, whose sum is σ = 4085792. Its totient is φ = 4085790.

The previous prime is 4085777. The next prime is 4085803. The reversal of 4085791 is 1975804.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4085791 - 2¹⁷ = 3954719 is a prime.

4085791 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4085761) 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 as a sum of consecutive naturals, namely, 2042895 + 2042896.

It is an arithmetic number, because the mean of its divisors is an integer number (2042896).

Almost surely, 2^4085791 is an apocalyptic number.

4085791 is a deficient number, since it is larger than the sum of its proper divisors (1).

4085791 is an equidigital number, since it uses as much as digits as its factorization.

4085791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 4085791 is about 2021.3339654792. Note that the first 3 decimals coincide. The cubic root of 4085791 is about 159.8669597199.

The spelling of 4085791 in words is "four million, eighty-five thousand, seven hundred ninety-one".