13786861 has 12 divisors (see below), whose sum is σ = 15680700. Its totient is φ = 12098240.

The previous prime is 13786841. The next prime is 13786873. The reversal of 13786861 is 16868731.

It can be written as a sum of positive squares in 2 ways, for example, as 4368100 + 9418761 = 2090^2 + 3069^2 .

It is not a de Polignac number, because 13786861 - 2⁷ = 13786733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13786811) 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, 1545 + ... + 5473.

It is an arithmetic number, because the mean of its divisors is an integer number (1306725).

Almost surely, 2^13786861 is an apocalyptic number.

13786861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13786861 is a deficient number, since it is larger than the sum of its proper divisors (1893839).

13786861 is a wasteful number, since it uses less digits than its factorization.

13786861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980 (or 3969 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 13786861 is about 3713.0662531121. The cubic root of 13786861 is about 239.7848824743.

The spelling of 13786861 in words is "thirteen million, seven hundred eighty-six thousand, eight hundred sixty-one".