11185945 has 4 divisors (see below), whose sum is σ = 13423140. Its totient is φ = 8948752.

The previous prime is 11185931. The next prime is 11185961. The reversal of 11185945 is 54958111.

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 6416089 + 4769856 = 2533^2 + 2184^2 .

It is a cyclic number.

It is not a de Polignac number, because 11185945 - 2⁷ = 11185817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11185945.

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 3 ways as a sum of consecutive naturals, for example, 1118590 + ... + 1118599.

It is an arithmetic number, because the mean of its divisors is an integer number (3355785).

Almost surely, 2^11185945 is an apocalyptic number.

It is an amenable number.

11185945 is a deficient number, since it is larger than the sum of its proper divisors (2237195).

11185945 is an equidigital number, since it uses as much as digits as its factorization.

11185945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237194.

The product of its digits is 7200, while the sum is 34.

The square root of 11185945 is about 3344.5395796731. The cubic root of 11185945 is about 223.6441589238.

The spelling of 11185945 in words is "eleven million, one hundred eighty-five thousand, nine hundred forty-five".