172371 has 4 divisors (see below), whose sum is σ = 229832. Its totient is φ = 114912.

The previous prime is 172357. The next prime is 172373. The reversal of 172371 is 173271.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 172371 - 2⁶ = 172307 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172373) 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, 28726 + ... + 28731.

It is an arithmetic number, because the mean of its divisors is an integer number (57458).

2¹⁷²³⁷¹ is an apocalyptic number.

172371 is a deficient number, since it is larger than the sum of its proper divisors (57461).

172371 is an equidigital number, since it uses as much as digits as its factorization.

172371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57460.

The product of its digits is 294, while the sum is 21.

The square root of 172371 is about 415.1758663506. The cubic root of 172371 is about 55.6529342503.

Subtracting 172371 from its reverse (173271), we obtain a square (900 = 30²).

The spelling of 172371 in words is "one hundred seventy-two thousand, three hundred seventy-one", and thus it is an iban number.