1591841 has 2 divisors, whose sum is σ = 1591842. Its totient is φ = 1591840.

The previous prime is 1591813. The next prime is 1591859. The reversal of 1591841 is 1481951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1201216 + 390625 = 1096^2 + 625^2 .

It is an emirp because it is prime and its reverse (1481951) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1591841 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1591871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795920 + 795921.

It is an arithmetic number, because the mean of its divisors is an integer number (795921).

2^1591841 is an apocalyptic number.

It is an amenable number.

1591841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591841 is an equidigital number, since it uses as much as digits as its factorization.

1591841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 29.

The square root of 1591841 is about 1261.6818140878. The cubic root of 1591841 is about 116.7615617949.

The spelling of 1591841 in words is "one million, five hundred ninety-one thousand, eight hundred forty-one".