234821 has 8 divisors (see below), whose sum is σ = 262080. Its totient is φ = 209088.

The previous prime is 234811. The next prime is 234833. The reversal of 234821 is 128432.

234821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 234821 - 2¹⁴ = 218437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 234793 and 234802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2²³⁴⁸²¹ is an apocalyptic number.

It is an amenable number.

234821 is a deficient number, since it is larger than the sum of its proper divisors (27259).

234821 is a wasteful number, since it uses less digits than its factorization.

234821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763.

The product of its digits is 384, while the sum is 20.

The square root of 234821 is about 484.5833261680. The cubic root of 234821 is about 61.6943857204.

The spelling of 234821 in words is "two hundred thirty-four thousand, eight hundred twenty-one".