11115287 has 4 divisors (see below), whose sum is σ = 11124816. Its totient is φ = 11105760.

The previous prime is 11115283. The next prime is 11115337. The reversal of 11115287 is 78251111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 11115287 - 2² = 11115283 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115283) 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 3 ways as a sum of consecutive naturals, for example, 2723 + ... + 5444.

It is an arithmetic number, because the mean of its divisors is an integer number (2781204).

Almost surely, 2^11115287 is an apocalyptic number.

11115287 is a deficient number, since it is larger than the sum of its proper divisors (9529).

11115287 is an equidigital number, since it uses as much as digits as its factorization.

11115287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528.

The product of its digits is 560, while the sum is 26.

The square root of 11115287 is about 3333.9596578243. The cubic root of 11115287 is about 223.1722679689.

Adding to 11115287 its reverse (78251111), we get a palindrome (89366398).

The spelling of 11115287 in words is "eleven million, one hundred fifteen thousand, two hundred eighty-seven".