4291 has 4 divisors (see below), whose sum is σ = 4912. Its totient is φ = 3672.

The previous prime is 4289. The next prime is 4297. The reversal of 4291 is 1924.

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 4291 - 2¹ = 4289 is a prime.

It is the 66-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4297) by changing a digit.

It is a nontrivial repunit in base 65.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300 + ... + 313.

It is an arithmetic number, because the mean of its divisors is an integer number (1228).

2⁴²⁹¹ is an apocalyptic number.

4291 is a deficient number, since it is larger than the sum of its proper divisors (621).

4291 is an equidigital number, since it uses as much as digits as its factorization.

4291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its digits is 72, while the sum is 16.

The square root of 4291 is about 65.5057249406. The cubic root of 4291 is about 16.2499802761.

The spelling of 4291 in words is "four thousand, two hundred ninety-one".