1080591 has 4 divisors (see below), whose sum is σ = 1440792. Its totient is φ = 720392.

The previous prime is 1080589. The next prime is 1080613. The reversal of 1080591 is 1950801.

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

It is a cyclic number.

It is not a de Polignac number, because 1080591 - 2¹ = 1080589 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180096 + ... + 180101.

It is an arithmetic number, because the mean of its divisors is an integer number (360198).

2^1080591 is an apocalyptic number.

1080591 is a deficient number, since it is larger than the sum of its proper divisors (360201).

1080591 is an equidigital number, since it uses as much as digits as its factorization.

1080591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360200.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 1080591 is about 1039.5147906596. The cubic root of 1080591 is about 102.6172681247.

It can be divided in two parts, 10 and 80591, that added together give a triangular number (80601 = T₄₀₁).

The spelling of 1080591 in words is "one million, eighty thousand, five hundred ninety-one".