13081085 has 4 divisors (see below), whose sum is σ = 15697308. Its totient is φ = 10464864.

The previous prime is 13081031. The next prime is 13081093. The reversal of 13081085 is 58018031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58018031 = 4409 ⋅13159.

It can be written as a sum of positive squares in 2 ways, for example, as 10004569 + 3076516 = 3163^2 + 1754^2 .

It is a cyclic number.

It is not a de Polignac number, because 13081085 - 2¹⁰ = 13080061 is a prime.

It is a super-2 number, since 2×13081085² = 342229569554450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308104 + ... + 1308113.

It is an arithmetic number, because the mean of its divisors is an integer number (3924327).

Almost surely, 2^13081085 is an apocalyptic number.

It is an amenable number.

13081085 is a deficient number, since it is larger than the sum of its proper divisors (2616223).

13081085 is an equidigital number, since it uses as much as digits as its factorization.

13081085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616222.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 13081085 is about 3616.7782624872. The cubic root of 13081085 is about 235.6213224735.

The spelling of 13081085 in words is "thirteen million, eighty-one thousand, eighty-five".