13561504 has 48 divisors (see below), whose sum is σ = 29665440. Its totient is φ = 6050560.

The previous prime is 13561487. The next prime is 13561507. The reversal of 13561504 is 40516531.

It is not an unprimeable number, because it can be changed into a prime (13561507) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20442 + ... + 21094.

It is an arithmetic number, because the mean of its divisors is an integer number (618030).

Almost surely, 2^13561504 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 13561504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14832720).

13561504 is an abundant number, since it is smaller than the sum of its proper divisors (16103936).

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

13561504 is a wasteful number, since it uses less digits than its factorization.

13561504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 13561504 is about 3682.5947374100. The cubic root of 13561504 is about 238.4712082527.

The spelling of 13561504 in words is "thirteen million, five hundred sixty-one thousand, five hundred four".