390171 has 4 divisors (see below), whose sum is σ = 520232. Its totient is φ = 260112.

The previous prime is 390161. The next prime is 390191. The reversal of 390171 is 171093.

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

It is not a de Polignac number, because 390171 - 2⁶ = 390107 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 (390101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65026 + ... + 65031.

It is an arithmetic number, because the mean of its divisors is an integer number (130058).

2³⁹⁰¹⁷¹ is an apocalyptic number.

390171 is a deficient number, since it is larger than the sum of its proper divisors (130061).

390171 is a wasteful number, since it uses less digits than its factorization.

390171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130060.

The product of its (nonzero) digits is 189, while the sum is 21.

The square root of 390171 is about 624.6366944072. The cubic root of 390171 is about 73.0721123902.

It can be divided in two parts, 390 and 171, that added together give a triangular number (561 = T₃₃).

The spelling of 390171 in words is "three hundred ninety thousand, one hundred seventy-one".