381043 has 4 divisors (see below), whose sum is σ = 410368. Its totient is φ = 351720.

The previous prime is 381037. The next prime is 381047. The reversal of 381043 is 340183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381043 - 2⁵ = 381011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381043.

It is not an unprimeable number, because it can be changed into a prime (381047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14643 + ... + 14668.

It is an arithmetic number, because the mean of its divisors is an integer number (102592).

2³⁸¹⁰⁴³ is an apocalyptic number.

381043 is a deficient number, since it is larger than the sum of its proper divisors (29325).

381043 is a wasteful number, since it uses less digits than its factorization.

381043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29324.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 381043 is about 617.2868053020. The cubic root of 381043 is about 72.4977724246.

It can be divided in two parts, 38 and 1043, that added together give a triangular number (1081 = T₄₆).

The spelling of 381043 in words is "three hundred eighty-one thousand, forty-three".