11575 has 6 divisors (see below), whose sum is σ = 14384. Its totient is φ = 9240.

The previous prime is 11551. The next prime is 11579. The reversal of 11575 is 57511.

It is not a de Polignac number, because 11575 - 2⁷ = 11447 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207 + ... + 256.

2¹¹⁵⁷⁵ is an apocalyptic number.

11575 is a deficient number, since it is larger than the sum of its proper divisors (2809).

11575 is an equidigital number, since it uses as much as digits as its factorization.

11575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 468 counting only the distinct ones).

The product of its digits is 175, while the sum is 19.

The square root of 11575 is about 107.5871739568. The cubic root of 11575 is about 22.6207499928.

It can be divided in two parts, 115 and 75, that added together give a triangular number (190 = T₁₉).

The spelling of 11575 in words is "eleven thousand, five hundred seventy-five".