13120665 has 8 divisors (see below), whose sum is σ = 20993088. Its totient is φ = 6997680.

The previous prime is 13120663. The next prime is 13120687. The reversal of 13120665 is 56602131.

13120665 is digitally balanced in base 3, 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 13120665 - 2¹ = 13120663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13120663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437341 + ... + 437370.

It is an arithmetic number, because the mean of its divisors is an integer number (2624136).

Almost surely, 2^13120665 is an apocalyptic number.

13120665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13120665 is a deficient number, since it is larger than the sum of its proper divisors (7872423).

13120665 is an equidigital number, since it uses as much as digits as its factorization.

13120665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874719.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 13120665 is about 3622.2458502979. The cubic root of 13120665 is about 235.8587263741.

Adding to 13120665 its reverse (56602131), we get a palindrome (69722796).

The spelling of 13120665 in words is "thirteen million, one hundred twenty thousand, six hundred sixty-five".