11512225 has 12 divisors (see below), whose sum is σ = 14511100. Its totient is φ = 9057600.

The previous prime is 11512223. The next prime is 11512231. The reversal of 11512225 is 52221511.

It can be written as a sum of positive squares in 6 ways, for example, as 760384 + 10751841 = 872^2 + 3279^2 .

It is not a de Polignac number, because 11512225 - 2¹ = 11512223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11512223) 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 11 ways as a sum of consecutive naturals, for example, 2250 + ... + 5299.

Almost surely, 2^11512225 is an apocalyptic number.

It is an amenable number.

11512225 is a deficient number, since it is larger than the sum of its proper divisors (2998875).

11512225 is an equidigital number, since it uses as much as digits as its factorization.

11512225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620 (or 7615 counting only the distinct ones).

The product of its digits is 200, while the sum is 19.

The square root of 11512225 is about 3392.9669907030. The cubic root of 11512225 is about 225.7978260859.

Adding to 11512225 its reverse (52221511), we get a palindrome (63733736).

The spelling of 11512225 in words is "eleven million, five hundred twelve thousand, two hundred twenty-five".