173156 has 12 divisors (see below), whose sum is σ = 307692. Its totient is φ = 85248.

The previous prime is 173149. The next prime is 173177. The reversal of 173156 is 651371.

It can be written as a sum of positive squares in 2 ways, for example, as 102400 + 70756 = 320^2 + 266^2 .

It is a congruent number.

It is an unprimeable number.

173156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 5 + ... + 588.

It is an arithmetic number, because the mean of its divisors is an integer number (25641).

2¹⁷³¹⁵⁶ is an apocalyptic number.

It is an amenable number.

173156 is a deficient number, since it is larger than the sum of its proper divisors (134536).

173156 is a wasteful number, since it uses less digits than its factorization.

173156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its digits is 630, while the sum is 23.

The square root of 173156 is about 416.1201749495. The cubic root of 173156 is about 55.7372898961.

The spelling of 173156 in words is "one hundred seventy-three thousand, one hundred fifty-six".