1159805 has 4 divisors (see below), whose sum is σ = 1391772. Its totient is φ = 927840.

The previous prime is 1159789. The next prime is 1159811. The reversal of 1159805 is 5089511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 573049 + 586756 = 757^2 + 766^2 .

It is not a de Polignac number, because 1159805 - 2⁴ = 1159789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115976 + ... + 115985.

It is an arithmetic number, because the mean of its divisors is an integer number (347943).

2^1159805 is an apocalyptic number.

It is an amenable number.

1159805 is a deficient number, since it is larger than the sum of its proper divisors (231967).

1159805 is an equidigital number, since it uses as much as digits as its factorization.

1159805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231966.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 1159805 is about 1076.9424311448. The cubic root of 1159805 is about 105.0658694783.

The spelling of 1159805 in words is "one million, one hundred fifty-nine thousand, eight hundred five".