13730561 has 8 divisors (see below), whose sum is σ = 14926464. Its totient is φ = 12554640.

The previous prime is 13730537. The next prime is 13730569. The reversal of 13730561 is 16503731.

It is a happy number.

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 13730561 - 2¹⁰ = 13729537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13730561.

It is not an unprimeable number, because it can be changed into a prime (13730569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3545 + ... + 6326.

It is an arithmetic number, because the mean of its divisors is an integer number (1865808).

Almost surely, 2^13730561 is an apocalyptic number.

It is an amenable number.

13730561 is a deficient number, since it is larger than the sum of its proper divisors (1195903).

13730561 is a wasteful number, since it uses less digits than its factorization.

13730561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 13730561 is about 3705.4771622559. The cubic root of 13730561 is about 239.4580421412.

The spelling of 13730561 in words is "thirteen million, seven hundred thirty thousand, five hundred sixty-one".