164945 has 8 divisors (see below), whose sum is σ = 216000. Its totient is φ = 119920.

The previous prime is 164911. The next prime is 164953. The reversal of 164945 is 549461.

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

It is not a de Polignac number, because 164945 - 2⁶ = 164881 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445 + ... + 1554.

It is an arithmetic number, because the mean of its divisors is an integer number (27000).

2¹⁶⁴⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

164945 is a deficient number, since it is larger than the sum of its proper divisors (51055).

164945 is a wasteful number, since it uses less digits than its factorization.

164945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015.

The product of its digits is 4320, while the sum is 29.

The square root of 164945 is about 406.1342142691. The cubic root of 164945 is about 54.8419706176.

It can be divided in two parts, 1 and 64945, that added together give a palindrome (64946).

The spelling of 164945 in words is "one hundred sixty-four thousand, nine hundred forty-five".