11172305 has 8 divisors (see below), whose sum is σ = 13425000. Its totient is φ = 8925696.

The previous prime is 11172289. The next prime is 11172311. The reversal of 11172305 is 50327111.

It can be written as a sum of positive squares in 4 ways, for example, as 3055504 + 8116801 = 1748^2 + 2849^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11172305 - 2⁴ = 11172289 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5351 + ... + 7139.

It is an arithmetic number, because the mean of its divisors is an integer number (1678125).

Almost surely, 2^11172305 is an apocalyptic number.

It is an amenable number.

11172305 is a deficient number, since it is larger than the sum of its proper divisors (2252695).

11172305 is a wasteful number, since it uses less digits than its factorization.

11172305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 11172305 is about 3342.4998130142. The cubic root of 11172305 is about 223.5532189963.

Adding to 11172305 its reverse (50327111), we get a palindrome (61499416).

The spelling of 11172305 in words is "eleven million, one hundred seventy-two thousand, three hundred five".