1006591 has 4 divisors (see below), whose sum is σ = 1031184. Its totient is φ = 982000.

The previous prime is 1006589. The next prime is 1006609. The reversal of 1006591 is 1956001.

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 1006591 - 2¹ = 1006589 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12235 + ... + 12316.

It is an arithmetic number, because the mean of its divisors is an integer number (257796).

2^1006591 is an apocalyptic number.

1006591 is a deficient number, since it is larger than the sum of its proper divisors (24593).

1006591 is an equidigital number, since it uses as much as digits as its factorization.

1006591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24592.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 1006591 is about 1003.2900876616. The cubic root of 1006591 is about 100.2192190788.

The spelling of 1006591 in words is "one million, six thousand, five hundred ninety-one".