2299921 has 12 divisors (see below), whose sum is σ = 2576640. Its totient is φ = 2049840.

The previous prime is 2299919. The next prime is 2299933. The reversal of 2299921 is 1299922.

It is not a de Polignac number, because 2299921 - 2¹ = 2299919 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2299901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5020 + ... + 5458.

It is an arithmetic number, because the mean of its divisors is an integer number (214720).

2^2299921 is an apocalyptic number.

It is an amenable number.

2299921 is a deficient number, since it is larger than the sum of its proper divisors (276719).

2299921 is a wasteful number, since it uses less digits than its factorization.

2299921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 483 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 2299921 is about 1516.5490430580. The cubic root of 2299921 is about 131.9991008509. Note that the first 3 decimals are identical.

Subtracting from 2299921 its reverse (1299922), we obtain a palindrome (999999).

The spelling of 2299921 in words is "two million, two hundred ninety-nine thousand, nine hundred twenty-one".