3821213 has 8 divisors (see below), whose sum is σ = 4208160. Its totient is φ = 3440880.

The previous prime is 3821203. The next prime is 3821219. The reversal of 3821213 is 3121283.

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 3821213 - 2¹² = 3817117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821219) 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 7 ways as a sum of consecutive naturals, for example, 395 + ... + 2792.

It is an arithmetic number, because the mean of its divisors is an integer number (526020).

Almost surely, 2^3821213 is an apocalyptic number.

It is an amenable number.

3821213 is a deficient number, since it is larger than the sum of its proper divisors (386947).

3821213 is a wasteful number, since it uses less digits than its factorization.

3821213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307.

The product of its digits is 288, while the sum is 20.

The square root of 3821213 is about 1954.7923163344. The cubic root of 3821213 is about 156.3389108908.

Adding to 3821213 its reverse (3121283), we get a palindrome (6942496).

The spelling of 3821213 in words is "three million, eight hundred twenty-one thousand, two hundred thirteen".