13280405 has 16 divisors (see below), whose sum is σ = 16744320. Its totient is φ = 10097472.

The previous prime is 13280401. The next prime is 13280413. The reversal of 13280405 is 50408231.

It is a cyclic number.

It is not a de Polignac number, because 13280405 - 2² = 13280401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13280401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9032 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (1046520).

Almost surely, 2^13280405 is an apocalyptic number.

It is an amenable number.

13280405 is a deficient number, since it is larger than the sum of its proper divisors (3463915).

13280405 is a wasteful number, since it uses less digits than its factorization.

13280405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 13280405 is about 3644.2289993907. The cubic root of 13280405 is about 236.8120368109.

Adding to 13280405 its reverse (50408231), we get a palindrome (63688636).

The spelling of 13280405 in words is "thirteen million, two hundred eighty thousand, four hundred five".