4256191 has 2 divisors, whose sum is σ = 4256192. Its totient is φ = 4256190.

The previous prime is 4256167. The next prime is 4256227. The reversal of 4256191 is 1916524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4256191 - 2⁵ = 4256159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4256101) 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, 2128095 + 2128096.

It is an arithmetic number, because the mean of its divisors is an integer number (2128096).

Almost surely, 2^4256191 is an apocalyptic number.

4256191 is a deficient number, since it is larger than the sum of its proper divisors (1).

4256191 is an equidigital number, since it uses as much as digits as its factorization.

4256191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 4256191 is about 2063.0538044365. The cubic root of 4256191 is about 162.0592045963.

The spelling of 4256191 in words is "four million, two hundred fifty-six thousand, one hundred ninety-one".