381705 has 8 divisors (see below), whose sum is σ = 610752. Its totient is φ = 203568.

The previous prime is 381697. The next prime is 381707. The reversal of 381705 is 507183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381705 - 2³ = 381697 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381705.

It is not an unprimeable number, because it can be changed into a prime (381707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12709 + ... + 12738.

It is an arithmetic number, because the mean of its divisors is an integer number (76344).

2³⁸¹⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

381705 is a deficient number, since it is larger than the sum of its proper divisors (229047).

381705 is a wasteful number, since it uses less digits than its factorization.

381705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25455.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 381705 is about 617.8227901267. The cubic root of 381705 is about 72.5397324821.

Adding to 381705 its reverse (507183), we get a palindrome (888888).

The spelling of 381705 in words is "three hundred eighty-one thousand, seven hundred five".