11509025 has 12 divisors (see below), whose sum is σ = 15568944. Its totient is φ = 8370000.

The previous prime is 11509021. The next prime is 11509037. The reversal of 11509025 is 52090511.

It is not a de Polignac number, because 11509025 - 2² = 11509021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11509021) 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, 20651 + ... + 21200.

It is an arithmetic number, because the mean of its divisors is an integer number (1297412).

Almost surely, 2^11509025 is an apocalyptic number.

It is an amenable number.

11509025 is a deficient number, since it is larger than the sum of its proper divisors (4059919).

11509025 is a wasteful number, since it uses less digits than its factorization.

11509025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41872 (or 41867 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 11509025 is about 3392.4953942489. The cubic root of 11509025 is about 225.7769028210.

Adding to 11509025 its reverse (52090511), we get a palindrome (63599536).

The spelling of 11509025 in words is "eleven million, five hundred nine thousand, twenty-five".