284465 has 4 divisors (see below), whose sum is σ = 341364. Its totient is φ = 227568.

The previous prime is 284447. The next prime is 284467. The reversal of 284465 is 564482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564482 = 2 ⋅282241.

It can be written as a sum of positive squares in 2 ways, for example, as 69169 + 215296 = 263^2 + 464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284465 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28442 + ... + 28451.

It is an arithmetic number, because the mean of its divisors is an integer number (85341).

2²⁸⁴⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

284465 is a deficient number, since it is larger than the sum of its proper divisors (56899).

284465 is an equidigital number, since it uses as much as digits as its factorization.

284465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56898.

The product of its digits is 7680, while the sum is 29.

The square root of 284465 is about 533.3526038185. The cubic root of 284465 is about 65.7672394760.

The spelling of 284465 in words is "two hundred eighty-four thousand, four hundred sixty-five".