11243591 has 4 divisors (see below), whose sum is σ = 11262432. Its totient is φ = 11224752.

The previous prime is 11243569. The next prime is 11243593. The reversal of 11243591 is 19534211.

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 11243591 - 2¹⁸ = 10981447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11243591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11243593) 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, 8495 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (2815608).

Almost surely, 2^11243591 is an apocalyptic number.

11243591 is a deficient number, since it is larger than the sum of its proper divisors (18841).

11243591 is an equidigital number, since it uses as much as digits as its factorization.

11243591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18840.

The product of its digits is 1080, while the sum is 26.

The square root of 11243591 is about 3353.1464328299. The cubic root of 11243591 is about 224.0276791370.

The spelling of 11243591 in words is "eleven million, two hundred forty-three thousand, five hundred ninety-one".