2130644 has 12 divisors (see below), whose sum is σ = 3948084. Its totient is φ = 1002624.

The previous prime is 2130631. The next prime is 2130671. The reversal of 2130644 is 4460312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1993744 + 136900 = 1412^2 + 370^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15599 + ... + 15734.

It is an arithmetic number, because the mean of its divisors is an integer number (329007).

2^2130644 is an apocalyptic number.

It is an amenable number.

2130644 is a deficient number, since it is larger than the sum of its proper divisors (1817440).

2130644 is a wasteful number, since it uses less digits than its factorization.

2130644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31354 (or 31352 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2130644 is about 1459.6725660229. The cubic root of 2130644 is about 128.6778009760.

Adding to 2130644 its reverse (4460312), we get a palindrome (6590956).

The spelling of 2130644 in words is "two million, one hundred thirty thousand, six hundred forty-four".