845543 has 6 divisors (see below), whose sum is σ = 868392. Its totient is φ = 823280.

The previous prime is 845531. The next prime is 845567. The reversal of 845543 is 345548.

It is not a de Polignac number, because 845543 - 2⁸ = 845287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847543) 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 5 ways as a sum of consecutive naturals, for example, 1430 + ... + 1932.

It is an arithmetic number, because the mean of its divisors is an integer number (144732).

2⁸⁴⁵⁵⁴³ is an apocalyptic number.

845543 is a deficient number, since it is larger than the sum of its proper divisors (22849).

845543 is an equidigital number, since it uses as much as digits as its factorization.

845543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 544 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 845543 is about 919.5341211722. The cubic root of 845543 is about 94.5609658576.

The spelling of 845543 in words is "eight hundred forty-five thousand, five hundred forty-three".