3103821 has 24 divisors (see below), whose sum is σ = 5395520. Its totient is φ = 1679616.

The previous prime is 3103817. The next prime is 3103829. The reversal of 3103821 is 1283013.

It is not a de Polignac number, because 3103821 - 2² = 3103817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3103794 and 3103803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3103829) 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 23 ways as a sum of consecutive naturals, for example, 100 + ... + 2493.

Almost surely, 2^3103821 is an apocalyptic number.

It is an amenable number.

3103821 is a deficient number, since it is larger than the sum of its proper divisors (2291699).

3103821 is a wasteful number, since it uses less digits than its factorization.

3103821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625 (or 2622 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 3103821 is about 1761.7664430906. The cubic root of 3103821 is about 145.8698565030.

Adding to 3103821 its reverse (1283013), we get a palindrome (4386834).

The spelling of 3103821 in words is "three million, one hundred three thousand, eight hundred twenty-one".