13085665 has 8 divisors (see below), whose sum is σ = 16626600. Its totient is φ = 9852672.

The previous prime is 13085663. The next prime is 13085671. The reversal of 13085665 is 56658031.

It can be written as a sum of positive squares in 4 ways, for example, as 6110784 + 6974881 = 2472^2 + 2641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13085665 - 2¹ = 13085663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13085665.

It is not an unprimeable number, because it can be changed into a prime (13085663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76890 + ... + 77059.

It is an arithmetic number, because the mean of its divisors is an integer number (2078325).

Almost surely, 2^13085665 is an apocalyptic number.

It is an amenable number.

13085665 is a deficient number, since it is larger than the sum of its proper divisors (3540935).

13085665 is a wasteful number, since it uses less digits than its factorization.

13085665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153971.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 13085665 is about 3617.4113672625. The cubic root of 13085665 is about 235.6488181473.

The spelling of 13085665 in words is "thirteen million, eighty-five thousand, six hundred sixty-five".