381775 has 6 divisors (see below), whose sum is σ = 473432. Its totient is φ = 305400.

The previous prime is 381761. The next prime is 381791. The reversal of 381775 is 577183.

It is not a de Polignac number, because 381775 - 2¹¹ = 379727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7611 + ... + 7660.

2³⁸¹⁷⁷⁵ is an apocalyptic number.

381775 is a deficient number, since it is larger than the sum of its proper divisors (91657).

381775 is a wasteful number, since it uses less digits than its factorization.

381775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15281 (or 15276 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 381775 is about 617.8794380783. The cubic root of 381775 is about 72.5441665091.

It can be divided in two parts, 381 and 775, that added together give a square (1156 = 34²).

The spelling of 381775 in words is "three hundred eighty-one thousand, seven hundred seventy-five".