11521265 has 16 divisors (see below), whose sum is σ = 16346880. Its totient is φ = 7627200.

The previous prime is 11521259. The next prime is 11521267. The reversal of 11521265 is 56212511.

It is a happy number.

It is not a de Polignac number, because 11521265 - 2⁴ = 11521249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11521265.

It is not an unprimeable number, because it can be changed into a prime (11521267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4661 + ... + 6690.

It is an arithmetic number, because the mean of its divisors is an integer number (1021680).

Almost surely, 2^11521265 is an apocalyptic number.

It is an amenable number.

11521265 is a deficient number, since it is larger than the sum of its proper divisors (4825615).

11521265 is a wasteful number, since it uses less digits than its factorization.

11521265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11392.

The product of its digits is 600, while the sum is 23.

The square root of 11521265 is about 3394.2988966795. The cubic root of 11521265 is about 225.8569133690.

Adding to 11521265 its reverse (56212511), we get a palindrome (67733776).

The spelling of 11521265 in words is "eleven million, five hundred twenty-one thousand, two hundred sixty-five".