171012985 has 16 divisors (see below), whose sum is σ = 241093440. Its totient is φ = 114805440.

The previous prime is 171012973. The next prime is 171013039. The reversal of 171012985 is 589210171.

It is a happy number.

It is not a de Polignac number, because 171012985 - 2⁵ = 171012953 is a prime.

It is a super-2 number, since 2×171012985² = 58490882077220450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 171012985.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118875 + ... + 120304.

It is an arithmetic number, because the mean of its divisors is an integer number (15068340).

Almost surely, 2^171012985 is an apocalyptic number.

It is an amenable number.

171012985 is a deficient number, since it is larger than the sum of its proper divisors (70080455).

171012985 is a wasteful number, since it uses less digits than its factorization.

171012985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239208.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 171012985 is about 13077.1933150810. The cubic root of 171012985 is about 555.0639592983.

The spelling of 171012985 in words is "one hundred seventy-one million, twelve thousand, nine hundred eighty-five".