11020591 has 4 divisors (see below), whose sum is σ = 11171632. Its totient is φ = 10869552.

The previous prime is 11020567. The next prime is 11020601. The reversal of 11020591 is 19502011.

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 11020591 - 2⁷ = 11020463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020501) 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, 75411 + ... + 75556.

It is an arithmetic number, because the mean of its divisors is an integer number (2792908).

Almost surely, 2^11020591 is an apocalyptic number.

11020591 is a deficient number, since it is larger than the sum of its proper divisors (151041).

11020591 is an equidigital number, since it uses as much as digits as its factorization.

11020591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151040.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 11020591 is about 3319.7275490618. The cubic root of 11020591 is about 222.5366921771.

It can be divided in two parts, 11020 and 591, that added together give a palindrome (11611).

The spelling of 11020591 in words is "eleven million, twenty thousand, five hundred ninety-one".