4205891 has 2 divisors, whose sum is σ = 4205892. Its totient is φ = 4205890.

The previous prime is 4205879. The next prime is 4205909. The reversal of 4205891 is 1985024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4205891 - 2²² = 11587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4205191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2102945 + 2102946.

It is an arithmetic number, because the mean of its divisors is an integer number (2102946).

Almost surely, 2^4205891 is an apocalyptic number.

4205891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4205891 is an equidigital number, since it uses as much as digits as its factorization.

4205891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 4205891 is about 2050.8269063965. The cubic root of 4205891 is about 161.4182635531.

The spelling of 4205891 in words is "four million, two hundred five thousand, eight hundred ninety-one".