11775 has 12 divisors (see below), whose sum is σ = 19592. Its totient is φ = 6240.

The previous prime is 11743. The next prime is 11777. The reversal of 11775 is 57711.

It is not a de Polignac number, because 11775 - 2⁵ = 11743 is a prime.

It is a super-3 number, since 3×11775³ = 4897833328125, which contains 333 as substring.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a nialpdrome in base 14.

It is a zygodrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4 + ... + 153.

2¹¹⁷⁷⁵ is an apocalyptic number.

11775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11775 is a deficient number, since it is larger than the sum of its proper divisors (7817).

11775 is a wasteful number, since it uses less digits than its factorization.

11775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 165 counting only the distinct ones).

The product of its digits is 245, while the sum is 21.

The square root of 11775 is about 108.5126720711. The cubic root of 11775 is about 22.7502918290.

It can be divided in two parts, 1177 and 5, that multiplied together give a palindrome (5885).

The spelling of 11775 in words is "eleven thousand, seven hundred seventy-five".