384561 has 8 divisors (see below), whose sum is σ = 569760. Its totient is φ = 256356.

The previous prime is 384547. The next prime is 384577. The reversal of 384561 is 165483.

It is not a de Polignac number, because 384561 - 2⁶ = 384497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 14243 = 384561 / (3 + 8 + 4 + 5 + 6 + 1).

It is a Curzon number.

384561 is a lucky number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (384581) 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 in 7 ways as a sum of consecutive naturals, for example, 7095 + ... + 7148.

It is an arithmetic number, because the mean of its divisors is an integer number (71220).

2³⁸⁴⁵⁶¹ is an apocalyptic number.

It is an amenable number.

384561 is a deficient number, since it is larger than the sum of its proper divisors (185199).

384561 is a wasteful number, since it uses less digits than its factorization.

384561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14252 (or 14246 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 384561 is about 620.1298251173. The cubic root of 384561 is about 72.7202024850.

The spelling of 384561 in words is "three hundred eighty-four thousand, five hundred sixty-one".