381715 has 4 divisors (see below), whose sum is σ = 458064. Its totient is φ = 305368.

The previous prime is 381713. The next prime is 381737. The reversal of 381715 is 517183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381715 - 2¹ = 381713 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 381715.

It is not an unprimeable number, because it can be changed into a prime (381713) 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, 38167 + ... + 38176.

It is an arithmetic number, because the mean of its divisors is an integer number (114516).

2³⁸¹⁷¹⁵ is an apocalyptic number.

381715 is a deficient number, since it is larger than the sum of its proper divisors (76349).

381715 is an equidigital number, since it uses as much as digits as its factorization.

381715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76348.

The product of its digits is 840, while the sum is 25.

The square root of 381715 is about 617.8308830093. The cubic root of 381715 is about 72.5403659477.

Adding to 381715 its reverse (517183), we get a palindrome (898898).

It can be divided in two parts, 3 and 81715, that added together give a palindrome (81718).

The spelling of 381715 in words is "three hundred eighty-one thousand, seven hundred fifteen".