1040591 has 4 divisors (see below), whose sum is σ = 1044552. Its totient is φ = 1036632.

The previous prime is 1040581. The next prime is 1040597. The reversal of 1040591 is 1950401.

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 1040591 - 2¹⁴ = 1024207 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (261138).

2^1040591 is an apocalyptic number.

1040591 is a deficient number, since it is larger than the sum of its proper divisors (3961).

1040591 is an equidigital number, since it uses as much as digits as its factorization.

1040591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1040591 is about 1020.0936231543. The cubic root of 1040591 is about 101.3351283250.

Adding to 1040591 its reverse (1950401), we get a palindrome (2990992).

The spelling of 1040591 in words is "one million, forty thousand, five hundred ninety-one".