11155239 has 20 divisors (see below), whose sum is σ = 17075520. Its totient is φ = 7253280.

The previous prime is 11155219. The next prime is 11155267. The reversal of 11155239 is 93255111.

It is not a de Polignac number, because 11155239 - 2⁹ = 11154727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155219) 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 19 ways as a sum of consecutive naturals, for example, 1642 + ... + 5000.

It is an arithmetic number, because the mean of its divisors is an integer number (853776).

Almost surely, 2^11155239 is an apocalyptic number.

11155239 is a deficient number, since it is larger than the sum of its proper divisors (5920281).

11155239 is an equidigital number, since it uses as much as digits as its factorization.

11155239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412 (or 3403 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 11155239 is about 3339.9459576466. The cubic root of 11155239 is about 223.4393331129.

It can be divided in two parts, 1115 and 5239, that multiplied together give a palindrome (5841485).

The spelling of 11155239 in words is "eleven million, one hundred fifty-five thousand, two hundred thirty-nine".