13860561 has 16 divisors (see below), whose sum is σ = 21712320. Its totient is φ = 7753920.

The previous prime is 13860551. The next prime is 13860563. The reversal of 13860561 is 16506831.

It is not a de Polignac number, because 13860561 - 2¹³ = 13852369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13860563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15726 + ... + 16583.

It is an arithmetic number, because the mean of its divisors is an integer number (1357020).

Almost surely, 2^13860561 is an apocalyptic number.

13860561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13860561 is a deficient number, since it is larger than the sum of its proper divisors (7851759).

13860561 is a wasteful number, since it uses less digits than its factorization.

13860561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32336.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13860561 is about 3722.9774374820. The cubic root of 13860561 is about 240.2113936095.

The spelling of 13860561 in words is "thirteen million, eight hundred sixty thousand, five hundred sixty-one".