4211891 has 2 divisors, whose sum is σ = 4211892. Its totient is φ = 4211890.

The previous prime is 4211887. The next prime is 4211899. The reversal of 4211891 is 1981124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4211891 - 2² = 4211887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4211891.

It is not a weakly prime, because it can be changed into another prime (4211899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105945 + 2105946.

It is an arithmetic number, because the mean of its divisors is an integer number (2105946).

Almost surely, 2^4211891 is an apocalyptic number.

4211891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4211891 is an equidigital number, since it uses as much as digits as its factorization.

4211891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 26.

The square root of 4211891 is about 2052.2892096388. The cubic root of 4211891 is about 161.4949852590.

The spelling of 4211891 in words is "four million, two hundred eleven thousand, eight hundred ninety-one".