381015 has 12 divisors (see below), whose sum is σ = 660504. Its totient is φ = 203184.

The previous prime is 381011. The next prime is 381019. The reversal of 381015 is 510183.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (381011) and next prime (381019).

It is not a de Polignac number, because 381015 - 2² = 381011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4189 + ... + 4278.

It is an arithmetic number, because the mean of its divisors is an integer number (55042).

2³⁸¹⁰¹⁵ is an apocalyptic number.

381015 is a deficient number, since it is larger than the sum of its proper divisors (279489).

381015 is a wasteful number, since it uses less digits than its factorization.

381015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8478 (or 8475 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 381015 is about 617.2641249903. The cubic root of 381015 is about 72.4959966081.

Adding to 381015 its reverse (510183), we get a palindrome (891198).

It can be divided in two parts, 3 and 81015, that added together give a palindrome (81018).

The spelling of 381015 in words is "three hundred eighty-one thousand, fifteen".