13280565 has 8 divisors (see below), whose sum is σ = 21248928. Its totient is φ = 7082960.

The previous prime is 13280503. The next prime is 13280573. The reversal of 13280565 is 56508231.

13280565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13280565 - 2⁷ = 13280437 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442671 + ... + 442700.

It is an arithmetic number, because the mean of its divisors is an integer number (2656116).

Almost surely, 2^13280565 is an apocalyptic number.

13280565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13280565 is a deficient number, since it is larger than the sum of its proper divisors (7968363).

13280565 is an equidigital number, since it uses as much as digits as its factorization.

13280565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885379.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 13280565 is about 3644.2509518418. The cubic root of 13280565 is about 236.8129878304.

Adding to 13280565 its reverse (56508231), we get a palindrome (69788796).

It can be divided in two parts, 132805 and 65, that added together give a triangular number (132870 = T₅₁₅).

The spelling of 13280565 in words is "thirteen million, two hundred eighty thousand, five hundred sixty-five".