165635 has 8 divisors (see below), whose sum is σ = 200976. Its totient is φ = 131040.

The previous prime is 165617. The next prime is 165653. The reversal of 165635 is 536561.

It is an interprime number because it is at equal distance from previous prime (165617) and next prime (165653).

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

It is not a de Polignac number, because 165635 - 2⁸ = 165379 is a prime.

It is a Duffinian number.

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, 680 + ... + 890.

It is an arithmetic number, because the mean of its divisors is an integer number (25122).

2¹⁶⁵⁶³⁵ is an apocalyptic number.

165635 is a deficient number, since it is larger than the sum of its proper divisors (35341).

165635 is a wasteful number, since it uses less digits than its factorization.

165635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

The product of its digits is 2700, while the sum is 26.

The square root of 165635 is about 406.9828006194. The cubic root of 165635 is about 54.9183361059.

The spelling of 165635 in words is "one hundred sixty-five thousand, six hundred thirty-five".