164845 has 4 divisors (see below), whose sum is σ = 197820. Its totient is φ = 131872.

The previous prime is 164839. The next prime is 164881. The reversal of 164845 is 548461.

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 60516 + 104329 = 246^2 + 323^2 .

It is a cyclic number.

It is not a de Polignac number, because 164845 - 2³ = 164837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16480 + ... + 16489.

It is an arithmetic number, because the mean of its divisors is an integer number (49455).

2¹⁶⁴⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

164845 is a deficient number, since it is larger than the sum of its proper divisors (32975).

164845 is an equidigital number, since it uses as much as digits as its factorization.

164845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32974.

The product of its digits is 3840, while the sum is 28.

The square root of 164845 is about 406.0110835926. The cubic root of 164845 is about 54.8308854968.

It can be divided in two parts, 1 and 64845, that added together give a palindrome (64846).

The spelling of 164845 in words is "one hundred sixty-four thousand, eight hundred forty-five".