13665365 has 36 divisors (see below), whose sum is σ = 20368836. Its totient is φ = 8773632.

The previous prime is 13665359. The next prime is 13665367. The reversal of 13665365 is 56356631.

It can be written as a sum of positive squares in 6 ways, for example, as 108241 + 13557124 = 329^2 + 3682^2 .

It is not a de Polignac number, because 13665365 - 2¹² = 13661269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665367) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70709 + ... + 70901.

It is an arithmetic number, because the mean of its divisors is an integer number (565801).

Almost surely, 2^13665365 is an apocalyptic number.

It is an amenable number.

13665365 is a deficient number, since it is larger than the sum of its proper divisors (6703471).

13665365 is a wasteful number, since it uses less digits than its factorization.

13665365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 222 counting only the distinct ones).

The product of its digits is 48600, while the sum is 35.

The square root of 13665365 is about 3696.6694469482. The cubic root of 13665365 is about 239.0784392665.

The spelling of 13665365 in words is "thirteen million, six hundred sixty-five thousand, three hundred sixty-five".