3335821 has 2 divisors, whose sum is σ = 3335822. Its totient is φ = 3335820.

The previous prime is 3335819. The next prime is 3335833. The reversal of 3335821 is 1285333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2673225 + 662596 = 1635^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 3335821 - 2¹ = 3335819 is a prime.

It is a super-2 number, since 2×3335821² = 22255403488082, which contains 22 as substring.

Together with 3335819, it forms a pair of twin primes.

It is an Ulam number.

It is equal to p₂₃₉₂₈₁ and since 3335821 and 239281 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3335021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1667910 + 1667911.

It is an arithmetic number, because the mean of its divisors is an integer number (1667911).

Almost surely, 2^3335821 is an apocalyptic number.

It is an amenable number.

3335821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3335821 is an equidigital number, since it uses as much as digits as its factorization.

3335821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 3335821 is about 1826.4230068634. The cubic root of 3335821 is about 149.4173097821.

The spelling of 3335821 in words is "three million, three hundred thirty-five thousand, eight hundred twenty-one".