1591859 has 2 divisors, whose sum is σ = 1591860. Its totient is φ = 1591858.

The previous prime is 1591841. The next prime is 1591871. The reversal of 1591859 is 9581951.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1591859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1591159) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795929 + 795930.

It is an arithmetic number, because the mean of its divisors is an integer number (795930).

2^1591859 is an apocalyptic number.

1591859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591859 is an equidigital number, since it uses as much as digits as its factorization.

1591859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 38.

The square root of 1591859 is about 1261.6889474034. The cubic root of 1591859 is about 116.7620018933.

The spelling of 1591859 in words is "one million, five hundred ninety-one thousand, eight hundred fifty-nine".