21234235 has 16 divisors (see below), whose sum is σ = 28758240. Its totient is φ = 14909440.

The previous prime is 21234211. The next prime is 21234281. The reversal of 21234235 is 53243212.

It is not a de Polignac number, because 21234235 - 2⁵ = 21234203 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5062 + ... + 8251.

It is an arithmetic number, because the mean of its divisors is an integer number (1797390).

Almost surely, 2^21234235 is an apocalyptic number.

21234235 is a deficient number, since it is larger than the sum of its proper divisors (7524005).

21234235 is a wasteful number, since it uses less digits than its factorization.

21234235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13358.

The product of its digits is 1440, while the sum is 22.

The square root of 21234235 is about 4608.0619570488. The cubic root of 21234235 is about 276.9143996470.

Adding to 21234235 its reverse (53243212), we get a palindrome (74477447).

It can be divided in two parts, 21 and 234235, that added together give a 4-th power (234256 = 22⁴).

The spelling of 21234235 in words is "twenty-one million, two hundred thirty-four thousand, two hundred thirty-five".