854565021 has 12 divisors (see below), whose sum is σ = 1242548320. Its totient is φ = 565936200.

The previous prime is 854565001. The next prime is 854565067. The reversal of 854565021 is 120565458.

It is not a de Polignac number, because 854565021 - 2¹⁵ = 854532253 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 (854565001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313051 + ... + 315768.

Almost surely, 2^854565021 is an apocalyptic number.

It is an amenable number.

854565021 is a deficient number, since it is larger than the sum of its proper divisors (387983299).

854565021 is a wasteful number, since it uses less digits than its factorization.

854565021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628976 (or 628973 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 854565021 is about 29232.9441042123. The cubic root of 854565021 is about 948.9610140609.

The spelling of 854565021 in words is "eight hundred fifty-four million, five hundred sixty-five thousand, twenty-one".