381375 has 32 divisors (see below), whose sum is σ = 711360. Its totient is φ = 201600.

The previous prime is 381373. The next prime is 381377. The reversal of 381375 is 573183.

It is an interprime number because it is at equal distance from previous prime (381373) and next prime (381377).

It is not a de Polignac number, because 381375 - 2¹ = 381373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

381375 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3319 + ... + 3431.

It is an arithmetic number, because the mean of its divisors is an integer number (22230).

2³⁸¹³⁷⁵ is an apocalyptic number.

381375 is a deficient number, since it is larger than the sum of its proper divisors (329985).

381375 is a wasteful number, since it uses less digits than its factorization.

381375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 121 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 381375 is about 617.5556655072. Note that the first 3 decimals coincide. The cubic root of 381375 is about 72.5188219067.

The spelling of 381375 in words is "three hundred eighty-one thousand, three hundred seventy-five".