13365641 has 4 divisors (see below), whose sum is σ = 13377300. Its totient is φ = 13353984.

The previous prime is 13365637. The next prime is 13365659. The reversal of 13365641 is 14656331.

It is a happy number.

13365641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14656331 = 1217 ⋅12043.

It can be written as a sum of positive squares in 2 ways, for example, as 5271616 + 8094025 = 2296^2 + 2845^2 .

It is a cyclic number.

It is not a de Polignac number, because 13365641 - 2² = 13365637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13365941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3896 + ... + 6473.

It is an arithmetic number, because the mean of its divisors is an integer number (3344325).

Almost surely, 2^13365641 is an apocalyptic number.

It is an amenable number.

13365641 is a deficient number, since it is larger than the sum of its proper divisors (11659).

13365641 is a wasteful number, since it uses less digits than its factorization.

13365641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11658.

The product of its digits is 6480, while the sum is 29.

The square root of 13365641 is about 3655.9049495303. The cubic root of 13365641 is about 237.3175906863.

The spelling of 13365641 in words is "thirteen million, three hundred sixty-five thousand, six hundred forty-one".