3843421 has 4 divisors (see below), whose sum is σ = 3850144. Its totient is φ = 3836700.

The previous prime is 3843419. The next prime is 3843451. The reversal of 3843421 is 1243483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3843421 - 2¹ = 3843419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3843451) 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, 2415 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (962536).

Almost surely, 2^3843421 is an apocalyptic number.

It is an amenable number.

3843421 is a deficient number, since it is larger than the sum of its proper divisors (6723).

3843421 is an equidigital number, since it uses as much as digits as its factorization.

3843421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722.

The product of its digits is 2304, while the sum is 25.

The square root of 3843421 is about 1960.4644857788. The cubic root of 3843421 is about 156.6411944906.

The spelling of 3843421 in words is "three million, eight hundred forty-three thousand, four hundred twenty-one".