1000591 has 4 divisors (see below), whose sum is σ = 1027672. Its totient is φ = 973512.

The previous prime is 1000589. The next prime is 1000609. The reversal of 1000591 is 1950001.

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 1000591 - 2¹ = 1000589 is a prime.

It is a Duffinian number.

1000591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000541) 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, 13485 + ... + 13558.

It is an arithmetic number, because the mean of its divisors is an integer number (256918).

2^1000591 is an apocalyptic number.

1000591 is a deficient number, since it is larger than the sum of its proper divisors (27081).

1000591 is an equidigital number, since it uses as much as digits as its factorization.

1000591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27080.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 1000591 is about 1000.2954563528. The cubic root of 1000591 is about 100.0196961204.

Adding to 1000591 its reverse (1950001), we get a palindrome (2950592).

The spelling of 1000591 in words is "one million, five hundred ninety-one", and thus it is an aban number.