13261081 has 4 divisors (see below), whose sum is σ = 13584564. Its totient is φ = 12937600.

The previous prime is 13261063. The next prime is 13261099. The reversal of 13261081 is 18016231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18016231 = 431 ⋅41801.

It is an interprime number because it is at equal distance from previous prime (13261063) and next prime (13261099).

It can be written as a sum of positive squares in 2 ways, for example, as 2005056 + 11256025 = 1416^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 13261081 - 2¹⁷ = 13130009 is a prime.

It is a super-2 number, since 2×13261081² = 351712538577122, 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 (13261021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161680 + ... + 161761.

It is an arithmetic number, because the mean of its divisors is an integer number (3396141).

Almost surely, 2^13261081 is an apocalyptic number.

It is an amenable number.

13261081 is a deficient number, since it is larger than the sum of its proper divisors (323483).

13261081 is an equidigital number, since it uses as much as digits as its factorization.

13261081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323482.

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

The square root of 13261081 is about 3641.5767189502. The cubic root of 13261081 is about 236.6971212104.

The spelling of 13261081 in words is "thirteen million, two hundred sixty-one thousand, eighty-one".