381165 has 8 divisors (see below), whose sum is σ = 609888. Its totient is φ = 203280.

The previous prime is 381103. The next prime is 381167. The reversal of 381165 is 561183.

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

It is not a de Polignac number, because 381165 - 2⁷ = 381037 is a prime.

381165 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381167) 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 7 ways as a sum of consecutive naturals, for example, 12691 + ... + 12720.

It is an arithmetic number, because the mean of its divisors is an integer number (76236).

2³⁸¹¹⁶⁵ is an apocalyptic number.

It is an amenable number.

381165 is a deficient number, since it is larger than the sum of its proper divisors (228723).

381165 is a wasteful number, since it uses less digits than its factorization.

381165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25419.

The product of its digits is 720, while the sum is 24.

The square root of 381165 is about 617.3856169364. The cubic root of 381165 is about 72.5055088957.

The spelling of 381165 in words is "three hundred eighty-one thousand, one hundred sixty-five".