11208591 has 8 divisors (see below), whose sum is σ = 16605360. Its totient is φ = 7472376.

The previous prime is 11208553. The next prime is 11208619. The reversal of 11208591 is 19580211.

It is not a de Polignac number, because 11208591 - 2¹⁵ = 11175823 is a prime.

It is a super-5 number, since 5×11208591⁵ (a number of 36 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 415133 = 11208591 / (1 + 1 + 2 + 0 + 8 + 5 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11208551) 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 7 ways as a sum of consecutive naturals, for example, 207540 + ... + 207593.

It is an arithmetic number, because the mean of its divisors is an integer number (2075670).

Almost surely, 2^11208591 is an apocalyptic number.

11208591 is a deficient number, since it is larger than the sum of its proper divisors (5396769).

11208591 is an equidigital number, since it uses as much as digits as its factorization.

11208591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415142 (or 415136 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 11208591 is about 3347.9233862202. The cubic root of 11208591 is about 223.7949800856.

The spelling of 11208591 in words is "eleven million, two hundred eight thousand, five hundred ninety-one".