170117128 has 32 divisors (see below), whose sum is σ = 324255960. Its totient is φ = 83660800.

The previous prime is 170117117. The next prime is 170117137. The reversal of 170117128 is 821711071.

It can be written as a sum of positive squares in 4 ways, for example, as 169572484 + 544644 = 13022^2 + 738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 170117096 and 170117105.

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, 139176 + ... + 140392.

Almost surely, 2^170117128 is an apocalyptic number.

It is an amenable number.

170117128 is a deficient number, since it is larger than the sum of its proper divisors (154138832).

170117128 is a wasteful number, since it uses less digits than its factorization.

170117128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 28.

The square root of 170117128 is about 13042.8956907582. The cubic root of 170117128 is about 554.0930217799.

Adding to 170117128 its reverse (821711071), we get a palindrome (991828199).

The spelling of 170117128 in words is "one hundred seventy million, one hundred seventeen thousand, one hundred twenty-eight".