11520055 has 4 divisors (see below), whose sum is σ = 13824072. Its totient is φ = 9216040.

The previous prime is 11520037. The next prime is 11520059. The reversal of 11520055 is 55002511.

11520055 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11520055 - 2¹⁷ = 11388983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520059) 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, 1152001 + ... + 1152010.

It is an arithmetic number, because the mean of its divisors is an integer number (3456018).

Almost surely, 2^11520055 is an apocalyptic number.

11520055 is a deficient number, since it is larger than the sum of its proper divisors (2304017).

11520055 is an equidigital number, since it uses as much as digits as its factorization.

11520055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304016.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 11520055 is about 3394.1206519510. The cubic root of 11520055 is about 225.8490063544.

Adding to 11520055 its reverse (55002511), we get a palindrome (66522566).

The spelling of 11520055 in words is "eleven million, five hundred twenty thousand, fifty-five".