3811421 has 4 divisors (see below), whose sum is σ = 3850812. Its totient is φ = 3772032.

The previous prime is 3811411. The next prime is 3811427. The reversal of 3811421 is 1241183.

3811421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2839225 + 972196 = 1685^2 + 986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3811421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3811393 and 3811402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811427) 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 3 ways as a sum of consecutive naturals, for example, 19550 + ... + 19743.

It is an arithmetic number, because the mean of its divisors is an integer number (962703).

Almost surely, 2^3811421 is an apocalyptic number.

It is an amenable number.

3811421 is a deficient number, since it is larger than the sum of its proper divisors (39391).

3811421 is an equidigital number, since it uses as much as digits as its factorization.

3811421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39390.

The product of its digits is 192, while the sum is 20.

The square root of 3811421 is about 1952.2860958374. The cubic root of 3811421 is about 156.2052552412.

The spelling of 3811421 in words is "three million, eight hundred eleven thousand, four hundred twenty-one".