2121436 has 6 divisors (see below), whose sum is σ = 3712520. Its totient is φ = 1060716.

The previous prime is 2121433. The next prime is 2121443. The reversal of 2121436 is 6341212.

2121436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121433) 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 as a sum of consecutive naturals, namely, 265176 + ... + 265183.

2^2121436 is an apocalyptic number.

It is an amenable number.

2121436 is a deficient number, since it is larger than the sum of its proper divisors (1591084).

2121436 is a wasteful number, since it uses less digits than its factorization.

2121436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530363 (or 530361 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 2121436 is about 1456.5150188034. The cubic root of 2121436 is about 128.4921644301.

Adding to 2121436 its reverse (6341212), we get a palindrome (8462648).

The spelling of 2121436 in words is "two million, one hundred twenty-one thousand, four hundred thirty-six".