6122821 has 4 divisors (see below), whose sum is σ = 6144012. Its totient is φ = 6101632.

The previous prime is 6122819. The next prime is 6122849. The reversal of 6122821 is 1282216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4901796 + 1221025 = 2214^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 6122821 - 2¹ = 6122819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6122792 and 6122801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6122801) 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 3 ways as a sum of consecutive naturals, for example, 10156 + ... + 10741.

It is an arithmetic number, because the mean of its divisors is an integer number (1536003).

Almost surely, 2^6122821 is an apocalyptic number.

It is an amenable number.

6122821 is a deficient number, since it is larger than the sum of its proper divisors (21191).

6122821 is a wasteful number, since it uses less digits than its factorization.

6122821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21190.

The product of its digits is 384, while the sum is 22.

The square root of 6122821 is about 2474.4334705140. The cubic root of 6122821 is about 182.9435859831.

The spelling of 6122821 in words is "six million, one hundred twenty-two thousand, eight hundred twenty-one".