845506 has 4 divisors (see below), whose sum is σ = 1268262. Its totient is φ = 422752.

The previous prime is 845491. The next prime is 845531. The reversal of 845506 is 605548.

845506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 837225 + 8281 = 915^2 + 91^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211375 + ... + 211378.

2⁸⁴⁵⁵⁰⁶ is an apocalyptic number.

845506 is a deficient number, since it is larger than the sum of its proper divisors (422756).

845506 is a wasteful number, since it uses less digits than its factorization.

845506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422755.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 845506 is about 919.5140020685. The cubic root of 845506 is about 94.5595865441.

The spelling of 845506 in words is "eight hundred forty-five thousand, five hundred six".