13105861 has 12 divisors (see below), whose sum is σ = 14091300. Its totient is φ = 12185600.

The previous prime is 13105817. The next prime is 13105867. The reversal of 13105861 is 16850131.

It can be written as a sum of positive squares in 6 ways, for example, as 4730625 + 8375236 = 2175^2 + 2894^2 .

It is not a de Polignac number, because 13105861 - 2²¹ = 11008709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13105867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28965 + ... + 29413.

It is an arithmetic number, because the mean of its divisors is an integer number (1174275).

Almost surely, 2^13105861 is an apocalyptic number.

It is an amenable number.

13105861 is a deficient number, since it is larger than the sum of its proper divisors (985439).

13105861 is a wasteful number, since it uses less digits than its factorization.

13105861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 13105861 is about 3620.2017899559. The cubic root of 13105861 is about 235.7699868014.

Adding to 13105861 its reverse (16850131), we get a palindrome (29955992).

The spelling of 13105861 in words is "thirteen million, one hundred five thousand, eight hundred sixty-one".