3001821 has 8 divisors (see below), whose sum is σ = 4042464. Its totient is φ = 1981200.

The previous prime is 3001811. The next prime is 3001837. The reversal of 3001821 is 1281003.

It is a happy number.

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

It is not a de Polignac number, because 3001821 - 2¹⁰ = 3000797 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3001821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3001811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4651 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (505308).

Almost surely, 2^3001821 is an apocalyptic number.

It is an amenable number.

3001821 is a deficient number, since it is larger than the sum of its proper divisors (1040643).

3001821 is a wasteful number, since it uses less digits than its factorization.

3001821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 3001821 is about 1732.5764052416. The cubic root of 3001821 is about 144.2541326446.

Adding to 3001821 its reverse (1281003), we get a palindrome (4282824).

The spelling of 3001821 in words is "three million, one thousand, eight hundred twenty-one".