2121632 has 12 divisors (see below), whose sum is σ = 4177026. Its totient is φ = 1060800.

The previous prime is 2121631. The next prime is 2121653. The reversal of 2121632 is 2361212.

It can be written as a sum of positive squares in only one way, i.e., 2062096 + 59536 = 1436^2 + 244^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2121632.

It is not an unprimeable number, because it can be changed into a prime (2121631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33119 + ... + 33182.

2^2121632 is an apocalyptic number.

It is an amenable number.

2121632 is a deficient number, since it is larger than the sum of its proper divisors (2055394).

2121632 is an equidigital number, since it uses as much as digits as its factorization.

2121632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66311 (or 66303 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 2121632 is about 1456.5823011420. The cubic root of 2121632 is about 128.4961214492.

Adding to 2121632 its reverse (2361212), we get a palindrome (4482844).

The spelling of 2121632 in words is "two million, one hundred twenty-one thousand, six hundred thirty-two".