381841 has 2 divisors, whose sum is σ = 381842. Its totient is φ = 381840.

The previous prime is 381817. The next prime is 381853. The reversal of 381841 is 148183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221841 + 160000 = 471^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 381841 - 2⁷ = 381713 is a prime.

It is not a weakly prime, because it can be changed into another prime (381541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190920 + 190921.

It is an arithmetic number, because the mean of its divisors is an integer number (190921).

2³⁸¹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

381841 is a deficient number, since it is larger than the sum of its proper divisors (1).

381841 is an equidigital number, since it uses as much as digits as its factorization.

381841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The square root of 381841 is about 617.9328442477. The cubic root of 381841 is about 72.5483466668.

The spelling of 381841 in words is "three hundred eighty-one thousand, eight hundred forty-one".