11481520 has 20 divisors (see below), whose sum is σ = 26694720. Its totient is φ = 4592576.

The previous prime is 11481497. The next prime is 11481521. The reversal of 11481520 is 2518411.

11481520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 11481491 and 11481500.

It is not an unprimeable number, because it can be changed into a prime (11481521) 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, 71680 + ... + 71839.

It is an arithmetic number, because the mean of its divisors is an integer number (1334736).

Almost surely, 2^11481520 is an apocalyptic number.

11481520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11481520 is an abundant number, since it is smaller than the sum of its proper divisors (15213200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11481520 is a wasteful number, since it uses less digits than its factorization.

11481520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143532 (or 143526 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 11481520 is about 3388.4391687029. The cubic root of 11481520 is about 225.5969006834.

Adding to 11481520 its reverse (2518411), we get a palindrome (13999931).

The spelling of 11481520 in words is "eleven million, four hundred eighty-one thousand, five hundred twenty".