103665 has 8 divisors (see below), whose sum is σ = 165888. Its totient is φ = 55280.

The previous prime is 103657. The next prime is 103669. The reversal of 103665 is 566301.

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

It is not a de Polignac number, because 103665 - 2³ = 103657 is a prime.

It is a Curzon number.

103665 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 103665.

It is not an unprimeable number, because it can be changed into a prime (103669) 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, 3441 + ... + 3470.

It is an arithmetic number, because the mean of its divisors is an integer number (20736).

2¹⁰³⁶⁶⁵ is an apocalyptic number.

103665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103665 is a deficient number, since it is larger than the sum of its proper divisors (62223).

103665 is an equidigital number, since it uses as much as digits as its factorization.

103665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6919.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 103665 is about 321.9704955427. The cubic root of 103665 is about 46.9761460364.

Adding to 103665 its reverse (566301), we get a palindrome (669966).

The spelling of 103665 in words is "one hundred three thousand, six hundred sixty-five".