13102681 has 4 divisors (see below), whose sum is σ = 13123764. Its totient is φ = 13081600.

The previous prime is 13102679. The next prime is 13102711. The reversal of 13102681 is 18620131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18620131 = 47 ⋅396173.

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 1651225 = 3384^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 13102681 - 2¹ = 13102679 is a prime.

It is a super-2 number, since 2×13102681² = 343360498775522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13102601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9580 + ... + 10861.

It is an arithmetic number, because the mean of its divisors is an integer number (3280941).

Almost surely, 2^13102681 is an apocalyptic number.

It is an amenable number.

13102681 is a deficient number, since it is larger than the sum of its proper divisors (21083).

13102681 is an equidigital number, since it uses as much as digits as its factorization.

13102681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21082.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 13102681 is about 3619.7625612739. The cubic root of 13102681 is about 235.7509162190.

The spelling of 13102681 in words is "thirteen million, one hundred two thousand, six hundred eighty-one".