2121344 has 16 divisors (see below), whose sum is σ = 4226370. Its totient is φ = 1060608.

The previous prime is 2121341. The next prime is 2121367. The reversal of 2121344 is 4431212.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 462400 = 1288^2 + 680^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (2121341) 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 as a sum of consecutive naturals, namely, 8159 + ... + 8414.

2^2121344 is an apocalyptic number.

It is an amenable number.

2121344 is a deficient number, since it is larger than the sum of its proper divisors (2105026).

2121344 is an equidigital number, since it uses as much as digits as its factorization.

2121344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16587 (or 16575 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 2121344 is about 1456.4834362258. The cubic root of 2121344 is about 128.4903069697.

Adding to 2121344 its reverse (4431212), we get a palindrome (6552556).

The spelling of 2121344 in words is "two million, one hundred twenty-one thousand, three hundred forty-four".