111287 has 8 divisors (see below), whose sum is σ = 124032. Its totient is φ = 99000.

The previous prime is 111271. The next prime is 111301. The reversal of 111287 is 782111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111287 - 2⁴ = 111271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111217) 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 7 ways as a sum of consecutive naturals, for example, 662 + ... + 812.

It is an arithmetic number, because the mean of its divisors is an integer number (15504).

2¹¹¹²⁸⁷ is an apocalyptic number.

111287 is a deficient number, since it is larger than the sum of its proper divisors (12745).

111287 is a wasteful number, since it uses less digits than its factorization.

111287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229.

The product of its digits is 112, while the sum is 20.

The square root of 111287 is about 333.5970623372. The cubic root of 111287 is about 48.1003398705.

Adding to 111287 its reverse (782111), we get a palindrome (893398).

The spelling of 111287 in words is "one hundred eleven thousand, two hundred eighty-seven".