384481 has 2 divisors, whose sum is σ = 384482. Its totient is φ = 384480.

The previous prime is 384479. The next prime is 384487. The reversal of 384481 is 184483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384400 + 81 = 620^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 384481 - 2¹ = 384479 is a prime.

It is a super-2 number, since 2×384481² = 295651278722, which contains 22 as substring.

Together with 384479, it forms a pair of twin primes.

384481 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (384487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192240 + 192241.

It is an arithmetic number, because the mean of its divisors is an integer number (192241).

2³⁸⁴⁴⁸¹ is an apocalyptic number.

It is an amenable number.

384481 is a deficient number, since it is larger than the sum of its proper divisors (1).

384481 is an equidigital number, since it uses as much as digits as its factorization.

384481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 384481 is about 620.0653191398. The cubic root of 384481 is about 72.7151594882.

It can be divided in two parts, 3844 and 81, that multiplied together give a square (311364 = 558²).

The spelling of 384481 in words is "three hundred eighty-four thousand, four hundred eighty-one".