11522520 has 128 divisors (see below), whose sum is σ = 39398400. Its totient is φ = 2994048.

The previous prime is 11522513. The next prime is 11522521. The reversal of 11522520 is 2522511.

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 = 11522493 and 11522502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11522521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50647 + ... + 50873.

It is an arithmetic number, because the mean of its divisors is an integer number (307800).

Almost surely, 2^11522520 is an apocalyptic number.

11522520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11522520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19699200).

11522520 is an abundant number, since it is smaller than the sum of its proper divisors (27875880).

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

11522520 is a wasteful number, since it uses less digits than its factorization.

11522520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 11522520 is about 3394.4837604561. The cubic root of 11522520 is about 225.8651138613.

Subtracting from 11522520 its reverse (2522511), we obtain a palindrome (9000009).

The spelling of 11522520 in words is "eleven million, five hundred twenty-two thousand, five hundred twenty".