4247891 has 6 divisors (see below), whose sum is σ = 4400292. Its totient is φ = 4100600.

The previous prime is 4247863. The next prime is 4247917. The reversal of 4247891 is 1987424.

It is not a de Polignac number, because 4247891 - 2⁶ = 4247827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4247821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1685 + ... + 3366.

It is an arithmetic number, because the mean of its divisors is an integer number (733382).

Almost surely, 2^4247891 is an apocalyptic number.

4247891 is a deficient number, since it is larger than the sum of its proper divisors (152401).

4247891 is an equidigital number, since it uses as much as digits as its factorization.

4247891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109 (or 5080 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 4247891 is about 2061.0412417028. The cubic root of 4247891 is about 161.9537921354.

The spelling of 4247891 in words is "four million, two hundred forty-seven thousand, eight hundred ninety-one".