3821005 has 8 divisors (see below), whose sum is σ = 4855032. Its totient is φ = 2876928.

The previous prime is 3821003. The next prime is 3821009. The reversal of 3821005 is 5001283.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2149156 + 1671849 = 1466^2 + 1293^2 .

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 3821005 - 2¹ = 3821003 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 (3821003) 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, 22392 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (606879).

Almost surely, 2^3821005 is an apocalyptic number.

It is an amenable number.

3821005 is a deficient number, since it is larger than the sum of its proper divisors (1034027).

3821005 is a wasteful number, since it uses less digits than its factorization.

3821005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44975.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 3821005 is about 1954.7391130276. The cubic root of 3821005 is about 156.3360741752.

Adding to 3821005 its reverse (5001283), we get a palindrome (8822288).

The spelling of 3821005 in words is "three million, eight hundred twenty-one thousand, five".