2123635 has 4 divisors (see below), whose sum is σ = 2548368. Its totient is φ = 1698904.

The previous prime is 2123617. The next prime is 2123663. The reversal of 2123635 is 5363212.

2123635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2123635 - 2⁵ = 2123603 is a prime.

It is a super-2 number, since 2×2123635² = 9019651226450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 212359 + ... + 212368.

It is an arithmetic number, because the mean of its divisors is an integer number (637092).

2^2123635 is an apocalyptic number.

2123635 is a deficient number, since it is larger than the sum of its proper divisors (424733).

2123635 is an equidigital number, since it uses as much as digits as its factorization.

2123635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424732.

The product of its digits is 1080, while the sum is 22.

The square root of 2123635 is about 1457.2697073637. The cubic root of 2123635 is about 128.5365457984.

Adding to 2123635 its reverse (5363212), we get a palindrome (7486847).

The spelling of 2123635 in words is "two million, one hundred twenty-three thousand, six hundred thirty-five".