384581 has 2 divisors, whose sum is σ = 384582. Its totient is φ = 384580.

The previous prime is 384577. The next prime is 384589. The reversal of 384581 is 185483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348100 + 36481 = 590^2 + 191^2 .

It is an emirp because it is prime and its reverse (185483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 384581 - 2² = 384577 is a prime.

It is a super-2 number, since 2×384581² = 295805091122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384589) 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 as a sum of consecutive naturals, namely, 192290 + 192291.

It is an arithmetic number, because the mean of its divisors is an integer number (192291).

2³⁸⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

384581 is a deficient number, since it is larger than the sum of its proper divisors (1).

384581 is an equidigital number, since it uses as much as digits as its factorization.

384581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 384581 is about 620.1459505633. The cubic root of 384581 is about 72.7214631249.

The spelling of 384581 in words is "three hundred eighty-four thousand, five hundred eighty-one".