11521224 has 128 divisors (see below), whose sum is σ = 37699200. Its totient is φ = 3214080.

The previous prime is 11521199. The next prime is 11521249. The reversal of 11521224 is 42212511.

It is an interprime number because it is at equal distance from previous prime (11521199) and next prime (11521249).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11521197 and 11521206.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 30702 + ... + 31074.

It is an arithmetic number, because the mean of its divisors is an integer number (294525).

Almost surely, 2^11521224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11521224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18849600).

11521224 is an abundant number, since it is smaller than the sum of its proper divisors (26177976).

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

11521224 is a wasteful number, since it uses less digits than its factorization.

11521224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 402 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 11521224 is about 3394.2928571353. The cubic root of 11521224 is about 225.8566454544.

Adding to 11521224 its reverse (42212511), we get a palindrome (53733735).

The spelling of 11521224 in words is "eleven million, five hundred twenty-one thousand, two hundred twenty-four".