11321520 has 160 divisors (see below), whose sum is σ = 41997312. Its totient is φ = 2466816.

The previous prime is 11321509. The next prime is 11321521. The reversal of 11321520 is 2512311.

It is a super-2 number, since 2×11321520² = 256353630220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11321520.

It is not an unprimeable number, because it can be changed into a prime (11321521) 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, 38494 + ... + 38786.

Almost surely, 2^11321520 is an apocalyptic number.

11321520 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 11321520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20998656).

11321520 is an abundant number, since it is smaller than the sum of its proper divisors (30675792).

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

11321520 is a wasteful number, since it uses less digits than its factorization.

11321520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 11321520 is about 3364.7466472232. The cubic root of 11321520 is about 224.5440643793.

Adding to 11321520 its reverse (2512311), we get a palindrome (13833831).

The spelling of 11321520 in words is "eleven million, three hundred twenty-one thousand, five hundred twenty".