233421 has 8 divisors (see below), whose sum is σ = 322080. Its totient is φ = 150192.

The previous prime is 233419. The next prime is 233423. The reversal of 233421 is 124332.

It is an interprime number because it is at equal distance from previous prime (233419) and next prime (233423).

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

It is not a de Polignac number, because 233421 - 2¹ = 233419 is a prime.

233421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 233421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233423) 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, 1255 + ... + 1428.

It is an arithmetic number, because the mean of its divisors is an integer number (40260).

2²³³⁴²¹ is an apocalyptic number.

It is an amenable number.

233421 is a deficient number, since it is larger than the sum of its proper divisors (88659).

233421 is a wasteful number, since it uses less digits than its factorization.

233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715.

The product of its digits is 144, while the sum is 15.

The square root of 233421 is about 483.1366266389. The cubic root of 233421 is about 61.5715341857.

Adding to 233421 its reverse (124332), we get a palindrome (357753).

The spelling of 233421 in words is "two hundred thirty-three thousand, four hundred twenty-one".