3876421 has 8 divisors (see below), whose sum is σ = 3953664. Its totient is φ = 3800160.

The previous prime is 3876413. The next prime is 3876449. The reversal of 3876421 is 1246783.

3876421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3876421 - 2³ = 3876413 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 (3876491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16521 + ... + 16753.

It is an arithmetic number, because the mean of its divisors is an integer number (494208).

Almost surely, 2^3876421 is an apocalyptic number.

It is an amenable number.

3876421 is a deficient number, since it is larger than the sum of its proper divisors (77243).

3876421 is a wasteful number, since it uses less digits than its factorization.

3876421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its digits is 8064, while the sum is 31.

The square root of 3876421 is about 1968.8628697804. The cubic root of 3876421 is about 157.0882298513.

The spelling of 3876421 in words is "three million, eight hundred seventy-six thousand, four hundred twenty-one".