13521472 has 28 divisors (see below), whose sum is σ = 27491436. Its totient is φ = 6594560.

The previous prime is 13521461. The next prime is 13521491. The reversal of 13521472 is 27412531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 9585216 = 1984^2 + 3096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48 + ... + 5200.

It is an arithmetic number, because the mean of its divisors is an integer number (981837).

Almost surely, 2^13521472 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 13521472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13745718).

13521472 is an abundant number, since it is smaller than the sum of its proper divisors (13969964).

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

13521472 is an equidigital number, since it uses as much as digits as its factorization.

13521472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5206 (or 5196 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 13521472 is about 3677.1554223340. The cubic root of 13521472 is about 238.2363304640.

The spelling of 13521472 in words is "thirteen million, five hundred twenty-one thousand, four hundred seventy-two".