863285521 has 8 divisors (see below), whose sum is σ = 1000508544. Its totient is φ = 729536640.

The previous prime is 863285491. The next prime is 863285537. The reversal of 863285521 is 125582368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 863285521 - 2⁹ = 863285009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863285561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868000 + ... + 868993.

It is an arithmetic number, because the mean of its divisors is an integer number (125063568).

Almost surely, 2^863285521 is an apocalyptic number.

It is an amenable number.

863285521 is a deficient number, since it is larger than the sum of its proper divisors (137223023).

863285521 is a wasteful number, since it uses less digits than its factorization.

863285521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737071.

The product of its digits is 115200, while the sum is 40.

The square root of 863285521 is about 29381.7208651910. The cubic root of 863285521 is about 952.1780206509.

The spelling of 863285521 in words is "eight hundred sixty-three million, two hundred eighty-five thousand, five hundred twenty-one".