381115 has 8 divisors (see below), whose sum is σ = 522720. Its totient is φ = 261312.

The previous prime is 381103. The next prime is 381167. The reversal of 381115 is 511183.

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

It is a cyclic number.

It is not a de Polignac number, because 381115 - 2¹⁷ = 250043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381092 and 381101.

It is an unprimeable number.

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, 5410 + ... + 5479.

It is an arithmetic number, because the mean of its divisors is an integer number (65340).

2³⁸¹¹¹⁵ is an apocalyptic number.

381115 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

381115 is a deficient number, since it is larger than the sum of its proper divisors (141605).

381115 is a wasteful number, since it uses less digits than its factorization.

381115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10901.

The product of its digits is 120, while the sum is 19.

The square root of 381115 is about 617.3451222776. The cubic root of 381115 is about 72.5023384105.

Adding to 381115 its reverse (511183), we get a palindrome (892298).

It can be divided in two parts, 381 and 115, that added together give a triangular number (496 = T₃₁).

The spelling of 381115 in words is "three hundred eighty-one thousand, one hundred fifteen".