381842 has 4 divisors (see below), whose sum is σ = 572766. Its totient is φ = 190920.

The previous prime is 381841. The next prime is 381853. The reversal of 381842 is 248183.

381842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 323761 + 58081 = 569^2 + 241^2 .

It is not an unprimeable number, because it can be changed into a prime (381841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95459 + ... + 95462.

2³⁸¹⁸⁴² is an apocalyptic number.

381842 is a deficient number, since it is larger than the sum of its proper divisors (190924).

381842 is a wasteful number, since it uses less digits than its factorization.

381842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190923.

The product of its digits is 1536, while the sum is 26.

The square root of 381842 is about 617.9336533965. The cubic root of 381842 is about 72.5484099988.

It can be divided in two parts, 38 and 1842, that multiplied together give a palindrome (69996).

The spelling of 381842 in words is "three hundred eighty-one thousand, eight hundred forty-two".