164545 has 4 divisors (see below), whose sum is σ = 197460. Its totient is φ = 131632.

The previous prime is 164531. The next prime is 164569. The reversal of 164545 is 545461.

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 103041 + 61504 = 321^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 164545 - 2⁵ = 164513 is a prime.

It is an Ulam 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, 16450 + ... + 16459.

It is an arithmetic number, because the mean of its divisors is an integer number (49365).

2¹⁶⁴⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

164545 is a deficient number, since it is larger than the sum of its proper divisors (32915).

164545 is an equidigital number, since it uses as much as digits as its factorization.

164545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32914.

The product of its digits is 2400, while the sum is 25.

The square root of 164545 is about 405.6414673083. The cubic root of 164545 is about 54.7976032127.

It can be divided in two parts, 1 and 64545, that added together give a palindrome (64546).

The spelling of 164545 in words is "one hundred sixty-four thousand, five hundred forty-five".