2288921 has 8 divisors (see below), whose sum is σ = 2350080. Its totient is φ = 2228688.

The previous prime is 2288893. The next prime is 2288927. The reversal of 2288921 is 1298822.

2288921 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 2288921 - 2¹⁴ = 2272537 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 (2288927) 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, 8375 + ... + 8643.

It is an arithmetic number, because the mean of its divisors is an integer number (293760).

2^2288921 is an apocalyptic number.

It is an amenable number.

2288921 is a deficient number, since it is larger than the sum of its proper divisors (61159).

2288921 is a wasteful number, since it uses less digits than its factorization.

2288921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its digits is 4608, while the sum is 32.

The square root of 2288921 is about 1512.9180414021. The cubic root of 2288921 is about 131.7883238828.

Subtracting from 2288921 its reverse (1298822), we obtain a palindrome (990099).

The spelling of 2288921 in words is "two million, two hundred eighty-eight thousand, nine hundred twenty-one".