845564 has 12 divisors (see below), whose sum is σ = 1491504. Its totient is φ = 419424.

The previous prime is 845531. The next prime is 845567. The reversal of 845564 is 465548.

It is a self number, because there is not a number n which added to its sum of digits gives 845564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845567) 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, 224 + ... + 1319.

It is an arithmetic number, because the mean of its divisors is an integer number (124292).

2⁸⁴⁵⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

845564 is a deficient number, since it is larger than the sum of its proper divisors (645940).

845564 is a wasteful number, since it uses less digits than its factorization.

845564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1682 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 845564 is about 919.5455399272. The cubic root of 845564 is about 94.5617486934.

The spelling of 845564 in words is "eight hundred forty-five thousand, five hundred sixty-four".