847249 has 4 divisors (see below), whose sum is σ = 912436. Its totient is φ = 782064.

The previous prime is 847247. The next prime is 847271. The reversal of 847249 is 942748.

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 37249 + 810000 = 193^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 847249 - 2¹ = 847247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847247) 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 3 ways as a sum of consecutive naturals, for example, 32574 + ... + 32599.

It is an arithmetic number, because the mean of its divisors is an integer number (228109).

2⁸⁴⁷²⁴⁹ is an apocalyptic number.

It is an amenable number.

847249 is a deficient number, since it is larger than the sum of its proper divisors (65187).

847249 is a wasteful number, since it uses less digits than its factorization.

847249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65186.

The product of its digits is 16128, while the sum is 34.

The square root of 847249 is about 920.4612973939. The cubic root of 847249 is about 94.6245197449.

The spelling of 847249 in words is "eight hundred forty-seven thousand, two hundred forty-nine".