381143 has 4 divisors (see below), whose sum is σ = 435600. Its totient is φ = 326688.

The previous prime is 381103. The next prime is 381167. The reversal of 381143 is 341183.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341183 = 19 ⋅17957.

It is a cyclic number.

It is not a de Polignac number, because 381143 - 2¹⁴ = 364759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381103) 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 3 ways as a sum of consecutive naturals, for example, 27218 + ... + 27231.

It is an arithmetic number, because the mean of its divisors is an integer number (108900).

2³⁸¹¹⁴³ is an apocalyptic number.

381143 is a deficient number, since it is larger than the sum of its proper divisors (54457).

381143 is an equidigital number, since it uses as much as digits as its factorization.

381143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54456.

The product of its digits is 288, while the sum is 20.

The square root of 381143 is about 617.3677996138. The cubic root of 381143 is about 72.5041139164.

It can be divided in two parts, 38 and 1143, that multiplied together give a palindrome (43434).

The spelling of 381143 in words is "three hundred eighty-one thousand, one hundred forty-three".