284661 has 16 divisors (see below), whose sum is σ = 454720. Its totient is φ = 174960.

The previous prime is 284659. The next prime is 284681. The reversal of 284661 is 166482.

It is not a de Polignac number, because 284661 - 2¹ = 284659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55 + ... + 756.

It is an arithmetic number, because the mean of its divisors is an integer number (28420).

2²⁸⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

284661 is a deficient number, since it is larger than the sum of its proper divisors (170059).

284661 is a wasteful number, since it uses less digits than its factorization.

284661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 827 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 284661 is about 533.5363155400. The cubic root of 284661 is about 65.7823408295.

The spelling of 284661 in words is "two hundred eighty-four thousand, six hundred sixty-one".