845539 has 4 divisors (see below), whose sum is σ = 857520. Its totient is φ = 833560.

The previous prime is 845531. The next prime is 845567. The reversal of 845539 is 935548.

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 845539 - 2³ = 845531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845531) 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, 5884 + ... + 6025.

It is an arithmetic number, because the mean of its divisors is an integer number (214380).

2⁸⁴⁵⁵³⁹ is an apocalyptic number.

845539 is a deficient number, since it is larger than the sum of its proper divisors (11981).

845539 is a wasteful number, since it uses less digits than its factorization.

845539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11980.

The product of its digits is 21600, while the sum is 34.

The square root of 845539 is about 919.5319461552. The cubic root of 845539 is about 94.5608167446.

Subtracting 845539 from its reverse (935548), we obtain a palindrome (90009).

The spelling of 845539 in words is "eight hundred forty-five thousand, five hundred thirty-nine".