11506865 has 8 divisors (see below), whose sum is σ = 13851240. Its totient is φ = 9176832.

The previous prime is 11506861. The next prime is 11506897. The reversal of 11506865 is 56860511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 564001 + 10942864 = 751^2 + 3308^2 .

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 11506865 - 2² = 11506861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11506861) 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 7 ways as a sum of consecutive naturals, for example, 1730 + ... + 5099.

It is an arithmetic number, because the mean of its divisors is an integer number (1731405).

Almost surely, 2^11506865 is an apocalyptic number.

It is an amenable number.

11506865 is a deficient number, since it is larger than the sum of its proper divisors (2344375).

11506865 is an equidigital number, since it uses as much as digits as its factorization.

11506865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7171.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 11506865 is about 3392.1770295785. The cubic root of 11506865 is about 225.7627774245.

The spelling of 11506865 in words is "eleven million, five hundred six thousand, eight hundred sixty-five".