11287 has 2 divisors, whose sum is σ = 11288. Its totient is φ = 11286.

The previous prime is 11279. The next prime is 11299. The reversal of 11287 is 78211.

11287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11287 - 2³ = 11279 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5643 + 5644.

It is an arithmetic number, because the mean of its divisors is an integer number (5644).

2¹¹²⁸⁷ is an apocalyptic number.

11287 is a deficient number, since it is larger than the sum of its proper divisors (1).

11287 is an equidigital number, since it uses as much as digits as its factorization.

11287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112, while the sum is 19.

The square root of 11287 is about 106.2402936743. The cubic root of 11287 is about 22.4315615888.

Subtracting from 11287 its product of digits (112), we obtain a triangular number (11175 = T₁₄₉).

Adding to 11287 its reverse (78211), we get a palindrome (89498).

The spelling of 11287 in words is "eleven thousand, two hundred eighty-seven".