13804561 has 4 divisors (see below), whose sum is σ = 14616612. Its totient is φ = 12992512.

The previous prime is 13804559. The next prime is 13804573. The reversal of 13804561 is 16540831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7529536 + 6275025 = 2744^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 13804561 - 2¹ = 13804559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13804501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406000 + ... + 406033.

It is an arithmetic number, because the mean of its divisors is an integer number (3654153).

Almost surely, 2^13804561 is an apocalyptic number.

It is an amenable number.

13804561 is a deficient number, since it is larger than the sum of its proper divisors (812051).

13804561 is an equidigital number, since it uses as much as digits as its factorization.

13804561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812050.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 13804561 is about 3715.4489634498. The cubic root of 13804561 is about 239.8874530169.

It can be divided in two parts, 13804 and 561, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 13804561 in words is "thirteen million, eight hundred four thousand, five hundred sixty-one".