11553665 has 4 divisors (see below), whose sum is σ = 13864404. Its totient is φ = 9242928.

The previous prime is 11553649. The next prime is 11553667. The reversal of 11553665 is 56635511.

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 5798464 + 5755201 = 2408^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 11553665 - 2⁴ = 11553649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155362 + ... + 1155371.

It is an arithmetic number, because the mean of its divisors is an integer number (3466101).

Almost surely, 2^11553665 is an apocalyptic number.

It is an amenable number.

11553665 is a deficient number, since it is larger than the sum of its proper divisors (2310739).

11553665 is an equidigital number, since it uses as much as digits as its factorization.

11553665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310738.

The product of its digits is 13500, while the sum is 32.

The square root of 11553665 is about 3399.0682546839. The cubic root of 11553665 is about 226.0684328228.

The spelling of 11553665 in words is "eleven million, five hundred fifty-three thousand, six hundred sixty-five".