284945 has 4 divisors (see below), whose sum is σ = 341940. Its totient is φ = 227952.

The previous prime is 284927. The next prime is 284957. The reversal of 284945 is 549482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183184 + 101761 = 428^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 284945 - 2⁶ = 284881 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28490 + ... + 28499.

It is an arithmetic number, because the mean of its divisors is an integer number (85485).

2²⁸⁴⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

284945 is a deficient number, since it is larger than the sum of its proper divisors (56995).

284945 is an equidigital number, since it uses as much as digits as its factorization.

284945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56994.

The product of its digits is 11520, while the sum is 32.

The square root of 284945 is about 533.8023978965. The cubic root of 284945 is about 65.8042100884.

The spelling of 284945 in words is "two hundred eighty-four thousand, nine hundred forty-five".