286945 has 4 divisors (see below), whose sum is σ = 344340. Its totient is φ = 229552.

The previous prime is 286927. The next prime is 286973. The reversal of 286945 is 549682.

It is a happy number.

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 154449 + 132496 = 393^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 286945 - 2¹¹ = 284897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 286945.

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, 28690 + ... + 28699.

It is an arithmetic number, because the mean of its divisors is an integer number (86085).

2²⁸⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

286945 is a deficient number, since it is larger than the sum of its proper divisors (57395).

286945 is an equidigital number, since it uses as much as digits as its factorization.

286945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57394.

The product of its digits is 17280, while the sum is 34.

The square root of 286945 is about 535.6724745588. The cubic root of 286945 is about 65.9578089699.

The spelling of 286945 in words is "two hundred eighty-six thousand, nine hundred forty-five".