3820621 has 8 divisors (see below), whose sum is σ = 4378304. Its totient is φ = 3265920.

The previous prime is 3820603. The next prime is 3820627. The reversal of 3820621 is 1260283.

3820621 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 not a de Polignac number, because 3820621 - 2⁵ = 3820589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3820592 and 3820601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820627) 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, 4306 + ... + 5116.

It is an arithmetic number, because the mean of its divisors is an integer number (547288).

Almost surely, 2^3820621 is an apocalyptic number.

It is an amenable number.

3820621 is a deficient number, since it is larger than the sum of its proper divisors (557683).

3820621 is an equidigital number, since it uses as much as digits as its factorization.

3820621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 3820621 is about 1954.6408877336. The cubic root of 3820621 is about 156.3308368913.

The spelling of 3820621 in words is "three million, eight hundred twenty thousand, six hundred twenty-one".