11115289 has 4 divisors (see below), whose sum is σ = 11122020. Its totient is φ = 11108560.

The previous prime is 11115283. The next prime is 11115337. The reversal of 11115289 is 98251111.

11115289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 can be written as a sum of positive squares in 2 ways, for example, as 9815689 + 1299600 = 3133^2 + 1140^2 .

It is a cyclic number.

It is not a de Polignac number, because 11115289 - 2⁵ = 11115257 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11115283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999 + ... + 4819.

It is an arithmetic number, because the mean of its divisors is an integer number (2780505).

Almost surely, 2^11115289 is an apocalyptic number.

It is an amenable number.

11115289 is a deficient number, since it is larger than the sum of its proper divisors (6731).

11115289 is an equidigital number, since it uses as much as digits as its factorization.

11115289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730.

The product of its digits is 720, while the sum is 28.

The square root of 11115289 is about 3333.9599577679. The cubic root of 11115289 is about 223.1722813542.

It can be divided in two parts, 1111 and 5289, that added together give a square (6400 = 80²).

The spelling of 11115289 in words is "eleven million, one hundred fifteen thousand, two hundred eighty-nine".