845047 has 4 divisors (see below), whose sum is σ = 965776. Its totient is φ = 724320.

The previous prime is 845041. The next prime is 845069. The reversal of 845047 is 740548.

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

It is a cyclic number.

It is not a de Polignac number, because 845047 - 2¹⁹ = 320759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60354 + ... + 60367.

It is an arithmetic number, because the mean of its divisors is an integer number (241444).

2⁸⁴⁵⁰⁴⁷ is an apocalyptic number.

845047 is a deficient number, since it is larger than the sum of its proper divisors (120729).

845047 is a wasteful number, since it uses less digits than its factorization.

845047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120728.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 845047 is about 919.2643798168. The cubic root of 845047 is about 94.5424722533.

The spelling of 845047 in words is "eight hundred forty-five thousand, forty-seven".