11553985 has 4 divisors (see below), whose sum is σ = 13864788. Its totient is φ = 9243184.

The previous prime is 11553943. The next prime is 11553989. The reversal of 11553985 is 58935511.

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 4068289 + 7485696 = 2017^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 11553985 - 2¹¹ = 11551937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553989) 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, 1155394 + ... + 1155403.

It is an arithmetic number, because the mean of its divisors is an integer number (3466197).

Almost surely, 2^11553985 is an apocalyptic number.

It is an amenable number.

11553985 is a deficient number, since it is larger than the sum of its proper divisors (2310803).

11553985 is an equidigital number, since it uses as much as digits as its factorization.

11553985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310802.

The product of its digits is 27000, while the sum is 37.

The square root of 11553985 is about 3399.1153260812. The cubic root of 11553985 is about 226.0705199305.

The spelling of 11553985 in words is "eleven million, five hundred fifty-three thousand, nine hundred eighty-five".