854564 has 6 divisors (see below), whose sum is σ = 1495494. Its totient is φ = 427280.

The previous prime is 854533. The next prime is 854569. The reversal of 854564 is 465458.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 350464 = 710^2 + 592^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 854564.

It is not an unprimeable number, because it can be changed into a prime (854569) by changing a digit.

854564 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106817 + ... + 106824.

It is an arithmetic number, because the mean of its divisors is an integer number (249249).

2⁸⁵⁴⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

854564 is a deficient number, since it is larger than the sum of its proper divisors (640930).

854564 is a wasteful number, since it uses less digits than its factorization.

854564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213645 (or 213643 counting only the distinct ones).

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

The square root of 854564 is about 924.4263085828. The cubic root of 854564 is about 94.8960636134.

The spelling of 854564 in words is "eight hundred fifty-four thousand, five hundred sixty-four".