381057 has 8 divisors (see below), whose sum is σ = 515520. Its totient is φ = 250320.

The previous prime is 381047. The next prime is 381061. The reversal of 381057 is 750183.

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

It is not a de Polignac number, because 381057 - 2⁷ = 380929 is a prime.

381057 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381057.

It is not an unprimeable number, because it can be changed into a prime (381037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682 + ... + 1107.

It is an arithmetic number, because the mean of its divisors is an integer number (64440).

2³⁸¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

381057 is a deficient number, since it is larger than the sum of its proper divisors (134463).

381057 is a wasteful number, since it uses less digits than its factorization.

381057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 381057 is about 617.2981451454. The cubic root of 381057 is about 72.4986603003.

The spelling of 381057 in words is "three hundred eighty-one thousand, fifty-seven".