170145 has 24 divisors (see below), whose sum is σ = 312000. Its totient is φ = 85536.

The previous prime is 170141. The next prime is 170167. The reversal of 170145 is 541071.

170145 = 66² + 67² + ... + 92².

It is not a de Polignac number, because 170145 - 2² = 170141 is a prime.

170145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (170141) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 756 + ... + 954.

It is an arithmetic number, because the mean of its divisors is an integer number (13000).

2¹⁷⁰¹⁴⁵ is an apocalyptic number.

170145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

170145 is a deficient number, since it is larger than the sum of its proper divisors (141855).

170145 is a wasteful number, since it uses less digits than its factorization.

170145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 170145 is about 412.4863634110. The cubic root of 170145 is about 55.4123281005.

The spelling of 170145 in words is "one hundred seventy thousand, one hundred forty-five".