171970 has 16 divisors (see below), whose sum is σ = 320760. Its totient is φ = 66304.

The previous prime is 171947. The next prime is 172001. The reversal of 171970 is 79171.

It can be written as a sum of positive squares in 4 ways, for example, as 146689 + 25281 = 383^2 + 159^2 .

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, 7 + ... + 586.

2¹⁷¹⁹⁷⁰ is an apocalyptic number.

171970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

171970 is a deficient number, since it is larger than the sum of its proper divisors (148790).

171970 is a wasteful number, since it uses less digits than its factorization.

171970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its (nonzero) digits is 441, while the sum is 25.

The square root of 171970 is about 414.6926572777. The cubic root of 171970 is about 55.6097441646.

The spelling of 171970 in words is "one hundred seventy-one thousand, nine hundred seventy".