172101 has 4 divisors (see below), whose sum is σ = 229472. Its totient is φ = 114732.

The previous prime is 172097. The next prime is 172127. The reversal of 172101 is 101271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101271 = 3 ⋅33757.

It is not a de Polignac number, because 172101 - 2² = 172097 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28681 + ... + 28686.

It is an arithmetic number, because the mean of its divisors is an integer number (57368).

2¹⁷²¹⁰¹ is an apocalyptic number.

It is an amenable number.

172101 is a deficient number, since it is larger than the sum of its proper divisors (57371).

172101 is an equidigital number, since it uses as much as digits as its factorization.

172101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57370.

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 172101 is about 414.8505755088. The cubic root of 172101 is about 55.6238610212.

Adding to 172101 its reverse (101271), we get a palindrome (273372).

The spelling of 172101 in words is "one hundred seventy-two thousand, one hundred one", and thus it is an iban number.