172086 has 32 divisors (see below), whose sum is σ = 380160. Its totient is φ = 51744.

The previous prime is 172079. The next prime is 172093. The reversal of 172086 is 680271.

It is an interprime number because it is at equal distance from previous prime (172079) and next prime (172093).

It is a super-2 number, since 2×172086² = 59227182792, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

172086 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 15 ways as a sum of consecutive naturals, for example, 3981 + ... + 4023.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2¹⁷²⁰⁸⁶ is an apocalyptic number.

172086 is an abundant number, since it is smaller than the sum of its proper divisors (208074).

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

172086 is a wasteful number, since it uses less digits than its factorization.

172086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 172086 is about 414.8324963163. The cubic root of 172086 is about 55.6222449504.

The spelling of 172086 in words is "one hundred seventy-two thousand, eighty-six".