164785 has 4 divisors (see below), whose sum is σ = 197748. Its totient is φ = 131824.

The previous prime is 164771. The next prime is 164789. The reversal of 164785 is 587461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 43681 = 348^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 164785 - 2¹³ = 156593 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16474 + ... + 16483.

It is an arithmetic number, because the mean of its divisors is an integer number (49437).

2¹⁶⁴⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

164785 is a deficient number, since it is larger than the sum of its proper divisors (32963).

164785 is an equidigital number, since it uses as much as digits as its factorization.

164785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32962.

The product of its digits is 6720, while the sum is 31.

The square root of 164785 is about 405.9371872593. The cubic root of 164785 is about 54.8242322724.

It can be divided in two parts, 164 and 785, that added together give a palindrome (949).

The spelling of 164785 in words is "one hundred sixty-four thousand, seven hundred eighty-five".