384921 has 12 divisors (see below), whose sum is σ = 585520. Its totient is φ = 243000.

The previous prime is 384919. The next prime is 384941. The reversal of 384921 is 129483.

It is not a de Polignac number, because 384921 - 2¹ = 384919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955 + ... + 1296.

2³⁸⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

384921 is a deficient number, since it is larger than the sum of its proper divisors (200599).

384921 is a wasteful number, since it uses less digits than its factorization.

384921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276 (or 2273 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 384921 is about 620.4200190194. The cubic root of 384921 is about 72.7428873196.

The spelling of 384921 in words is "three hundred eighty-four thousand, nine hundred twenty-one".