381005 has 8 divisors (see below), whose sum is σ = 460824. Its totient is φ = 302400.

The previous prime is 381001. The next prime is 381011. The reversal of 381005 is 500183.

381005 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 4 ways, for example, as 51529 + 329476 = 227^2 + 574^2 .

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

It is not a de Polignac number, because 381005 - 2² = 381001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381001) 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, 695 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (57603).

2³⁸¹⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

381005 is a deficient number, since it is larger than the sum of its proper divisors (79819).

381005 is a wasteful number, since it uses less digits than its factorization.

381005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 381005 is about 617.2560246770. The cubic root of 381005 is about 72.4953623668.

Adding to 381005 its reverse (500183), we get a palindrome (881188).

The spelling of 381005 in words is "three hundred eighty-one thousand, five".