13270665 has 16 divisors (see below), whose sum is σ = 21326976. Its totient is φ = 7046400.

The previous prime is 13270651. The next prime is 13270669. The reversal of 13270665 is 56607231.

It is not a de Polignac number, because 13270665 - 2⁶ = 13270601 is a prime.

It is a super-2 number, since 2×13270665² = 352221099084450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13270669) 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 15 ways as a sum of consecutive naturals, for example, 1780 + ... + 5450.

It is an arithmetic number, because the mean of its divisors is an integer number (1332936).

Almost surely, 2^13270665 is an apocalyptic number.

13270665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13270665 is a deficient number, since it is larger than the sum of its proper divisors (8056311).

13270665 is a wasteful number, since it uses less digits than its factorization.

13270665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 13270665 is about 3642.8923947874. The cubic root of 13270665 is about 236.7541291052.

Adding to 13270665 its reverse (56607231), we get a palindrome (69877896).

The spelling of 13270665 in words is "thirteen million, two hundred seventy thousand, six hundred sixty-five".