381171 has 12 divisors (see below), whose sum is σ = 591432. Its totient is φ = 217728.

The previous prime is 381169. The next prime is 381181. The reversal of 381171 is 171183.

It is not a de Polignac number, because 381171 - 2¹ = 381169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

381171 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381181) 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 11 ways as a sum of consecutive naturals, for example, 1150 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (49286).

2³⁸¹¹⁷¹ is an apocalyptic number.

381171 is a deficient number, since it is larger than the sum of its proper divisors (210261).

381171 is a wasteful number, since it uses less digits than its factorization.

381171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610 (or 2603 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 381171 is about 617.3904761170. The cubic root of 381171 is about 72.5058893353.

The spelling of 381171 in words is "three hundred eighty-one thousand, one hundred seventy-one".