13837561 has 8 divisors (see below), whose sum is σ = 14152320. Its totient is φ = 13526448.

The previous prime is 13837547. The next prime is 13837573. The reversal of 13837561 is 16573831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13837561 - 2⁷ = 13837433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13837361) 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, 7635 + ... + 9271.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^13837561 is an apocalyptic number.

It is an amenable number.

13837561 is a deficient number, since it is larger than the sum of its proper divisors (314759).

13837561 is a wasteful number, since it uses less digits than its factorization.

13837561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823.

The product of its digits is 15120, while the sum is 34.

The square root of 13837561 is about 3719.8872294735. The cubic root of 13837561 is about 240.0784523616.

The spelling of 13837561 in words is "thirteen million, eight hundred thirty-seven thousand, five hundred sixty-one".