173128 has 32 divisors (see below), whose sum is σ = 367200. Its totient is φ = 76032.

The previous prime is 173099. The next prime is 173137. The reversal of 173128 is 821371.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 173099 and 173108.

It is an unprimeable number.

173128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 2617.

It is an arithmetic number, because the mean of its divisors is an integer number (11475).

2¹⁷³¹²⁸ is an apocalyptic number.

It is an amenable number.

173128 is an abundant number, since it is smaller than the sum of its proper divisors (194072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

173128 is a wasteful number, since it uses less digits than its factorization.

173128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 105 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 173128 is about 416.0865294623. The cubic root of 173128 is about 55.7342854218.

Adding to 173128 its reverse (821371), we get a palindrome (994499).

The spelling of 173128 in words is "one hundred seventy-three thousand, one hundred twenty-eight".