11162005 has 4 divisors (see below), whose sum is σ = 13394412. Its totient is φ = 8929600.

The previous prime is 11161993. The next prime is 11162009. The reversal of 11162005 is 50026111.

11162005 = 1052² + 1053² + ... + 1061².

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2815684 + 8346321 = 1678^2 + 2889^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11162005 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11162005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11162009) 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 3 ways as a sum of consecutive naturals, for example, 1116196 + ... + 1116205.

It is an arithmetic number, because the mean of its divisors is an integer number (3348603).

Almost surely, 2^11162005 is an apocalyptic number.

It is an amenable number.

11162005 is a deficient number, since it is larger than the sum of its proper divisors (2232407).

11162005 is an equidigital number, since it uses as much as digits as its factorization.

11162005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232406.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 11162005 is about 3340.9586947462. The cubic root of 11162005 is about 223.4844982884.

Adding to 11162005 its reverse (50026111), we get a palindrome (61188116).

The spelling of 11162005 in words is "eleven million, one hundred sixty-two thousand, five".