381671 has 4 divisors (see below), whose sum is σ = 388200. Its totient is φ = 375144.

The previous prime is 381659. The next prime is 381673. The reversal of 381671 is 176183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176183 = 7 ⋅25169.

It is a cyclic number.

It is not a de Polignac number, because 381671 - 2⁶ = 381607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381671.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381671.

It is not an unprimeable number, because it can be changed into a prime (381673) 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, 3176 + ... + 3293.

It is an arithmetic number, because the mean of its divisors is an integer number (97050).

2³⁸¹⁶⁷¹ is an apocalyptic number.

381671 is a deficient number, since it is larger than the sum of its proper divisors (6529).

381671 is an equidigital number, since it uses as much as digits as its factorization.

381671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6528.

The product of its digits is 1008, while the sum is 26.

The square root of 381671 is about 617.7952735332. The cubic root of 381671 is about 72.5375786162.

The spelling of 381671 in words is "three hundred eighty-one thousand, six hundred seventy-one".