13665345 has 8 divisors (see below), whose sum is σ = 21864576. Its totient is φ = 7288176.

The previous prime is 13665343. The next prime is 13665347. The reversal of 13665345 is 54356631.

It is an interprime number because it is at equal distance from previous prime (13665343) and next prime (13665347).

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

It is not a de Polignac number, because 13665345 - 2¹ = 13665343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13665343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455497 + ... + 455526.

It is an arithmetic number, because the mean of its divisors is an integer number (2733072).

Almost surely, 2^13665345 is an apocalyptic number.

13665345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13665345 is a deficient number, since it is larger than the sum of its proper divisors (8199231).

13665345 is an equidigital number, since it uses as much as digits as its factorization.

13665345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911031.

The product of its digits is 32400, while the sum is 33.

The square root of 13665345 is about 3696.6667418094. Note that the first 3 decimals coincide. The cubic root of 13665345 is about 239.0783226317.

The spelling of 13665345 in words is "thirteen million, six hundred sixty-five thousand, three hundred forty-five".