234021 has 4 divisors (see below), whose sum is σ = 312032. Its totient is φ = 156012.

The previous prime is 234007. The next prime is 234029. The reversal of 234021 is 120432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 234021 - 2⁹ = 233509 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233988 and 234006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39001 + ... + 39006.

It is an arithmetic number, because the mean of its divisors is an integer number (78008).

2²³⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

234021 is a deficient number, since it is larger than the sum of its proper divisors (78011).

234021 is an equidigital number, since it uses as much as digits as its factorization.

234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78010.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 234021 is about 483.7571704895. The cubic root of 234021 is about 61.6242448275.

Adding to 234021 its reverse (120432), we get a palindrome (354453).

The spelling of 234021 in words is "two hundred thirty-four thousand, twenty-one".