8821001 has 4 divisors (see below), whose sum is σ = 10081152. Its totient is φ = 7560852.

The previous prime is 8820971. The next prime is 8821003. The reversal of 8821001 is 1001288.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8821001 - 2¹⁰ = 8819977 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 (8821003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630065 + ... + 630078.

It is an arithmetic number, because the mean of its divisors is an integer number (2520288).

Almost surely, 2^8821001 is an apocalyptic number.

It is an amenable number.

8821001 is a deficient number, since it is larger than the sum of its proper divisors (1260151).

8821001 is a wasteful number, since it uses less digits than its factorization.

8821001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260150.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 8821001 is about 2970.0170033183. The cubic root of 8821001 is about 206.6201268195.

Adding to 8821001 its reverse (1001288), we get a palindrome (9822289).

The spelling of 8821001 in words is "eight million, eight hundred twenty-one thousand, one".