117565 has 8 divisors (see below), whose sum is σ = 161280. Its totient is φ = 80592.

The previous prime is 117563. The next prime is 117571. The reversal of 117565 is 565711.

117565 = 31² + 32² + ... + 72².

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 117565 - 2¹ = 117563 is a prime.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2¹¹⁷⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

117565 is a deficient number, since it is larger than the sum of its proper divisors (43715).

117565 is an equidigital number, since it uses as much as digits as its factorization.

117565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371.

The product of its digits is 1050, while the sum is 25.

The square root of 117565 is about 342.8775291558. The cubic root of 117565 is about 48.9883354159.

The spelling of 117565 in words is "one hundred seventeen thousand, five hundred sixty-five".