113665 has 8 divisors (see below), whose sum is σ = 138240. Its totient is φ = 89712.

The previous prime is 113657. The next prime is 113683. The reversal of 113665 is 566311.

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

It is a cyclic number.

It is not a de Polignac number, because 113665 - 2³ = 113657 is a prime.

It is an unprimeable number.

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, 546 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

It is a Proth number, since it is equal to 111 ⋅ 2¹⁰ + 1 and 111 < 2¹⁰.

2¹¹³⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

113665 is a deficient number, since it is larger than the sum of its proper divisors (24575).

113665 is a wasteful number, since it uses less digits than its factorization.

113665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 540, while the sum is 22.

The square root of 113665 is about 337.1424031474. The cubic root of 113665 is about 48.4405336289.

Adding to 113665 its reverse (566311), we get a palindrome (679976).

The spelling of 113665 in words is "one hundred thirteen thousand, six hundred sixty-five".