2881021 has 8 divisors (see below), whose sum is σ = 3384864. Its totient is φ = 2417520.

The previous prime is 2881009. The next prime is 2881031. The reversal of 2881021 is 1201882.

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 2881021 - 2⁹ = 2880509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2880983 and 2881001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9931 + ... + 10216.

It is an arithmetic number, because the mean of its divisors is an integer number (423108).

2^2881021 is an apocalyptic number.

It is an amenable number.

2881021 is a deficient number, since it is larger than the sum of its proper divisors (503843).

2881021 is a wasteful number, since it uses less digits than its factorization.

2881021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20171.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 2881021 is about 1697.3570632015. The cubic root of 2881021 is about 142.2925431009.

The spelling of 2881021 in words is "two million, eight hundred eighty-one thousand, twenty-one".