10285821 has 48 divisors (see below), whose sum is σ = 19277440. Its totient is φ = 5132160.

The previous prime is 10285817. The next prime is 10285829. The reversal of 10285821 is 12858201.

It is not a de Polignac number, because 10285821 - 2² = 10285817 is a prime.

It is a super-2 number, since 2×10285821² = 211596227288082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10285829) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15231 + ... + 15891.

Almost surely, 2^10285821 is an apocalyptic number.

It is an amenable number.

10285821 is a deficient number, since it is larger than the sum of its proper divisors (8991619).

10285821 is a wasteful number, since it uses less digits than its factorization.

10285821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 10285821 is about 3207.1515399182. The cubic root of 10285821 is about 217.4768267027.

The spelling of 10285821 in words is "ten million, two hundred eighty-five thousand, eight hundred twenty-one".