381711 has 16 divisors (see below), whose sum is σ = 570240. Its totient is φ = 225120.

The previous prime is 381707. The next prime is 381713. The reversal of 381711 is 117183.

It is not a de Polignac number, because 381711 - 2² = 381707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381713) 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 15 ways as a sum of consecutive naturals, for example, 1285 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (35640).

2³⁸¹⁷¹¹ is an apocalyptic number.

381711 is a deficient number, since it is larger than the sum of its proper divisors (188529).

381711 is a wasteful number, since it uses less digits than its factorization.

381711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326.

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

The square root of 381711 is about 617.8276458690. The cubic root of 381711 is about 72.5401125628.

Adding to 381711 its reverse (117183), we get a palindrome (498894).

It can be divided in two parts, 3817 and 11, that added together give a triangular number (3828 = T₈₇).

The spelling of 381711 in words is "three hundred eighty-one thousand, seven hundred eleven".