172006 has 8 divisors (see below), whose sum is σ = 273240. Its totient is φ = 80928.

The previous prime is 172001. The next prime is 172009. The reversal of 172006 is 600271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172001) by changing a digit.

172006 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 3 ways as a sum of consecutive naturals, for example, 2496 + ... + 2563.

It is an arithmetic number, because the mean of its divisors is an integer number (34155).

2¹⁷²⁰⁰⁶ is an apocalyptic number.

172006 is a deficient number, since it is larger than the sum of its proper divisors (101234).

172006 is a wasteful number, since it uses less digits than its factorization.

172006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 172006 is about 414.7360606458. The cubic root of 172006 is about 55.6136243202.

Adding to 172006 its reverse (600271), we get a palindrome (772277).

The spelling of 172006 in words is "one hundred seventy-two thousand, six".