235665 has 12 divisors (see below), whose sum is σ = 408564. Its totient is φ = 125664.

The previous prime is 235663. The next prime is 235673. The reversal of 235665 is 566532.

It can be written as a sum of positive squares in 2 ways, for example, as 147456 + 88209 = 384^2 + 297^2 .

It is not a de Polignac number, because 235665 - 2¹ = 235663 is a prime.

235665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (235661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2574 + ... + 2663.

It is an arithmetic number, because the mean of its divisors is an integer number (34047).

2²³⁵⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

235665 is a deficient number, since it is larger than the sum of its proper divisors (172899).

235665 is a wasteful number, since it uses less digits than its factorization.

235665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 5245 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 235665 is about 485.4533963214. The cubic root of 235665 is about 61.7682118858.

It can be divided in two parts, 235 and 665, that added together give a square (900 = 30²).

The spelling of 235665 in words is "two hundred thirty-five thousand, six hundred sixty-five".