238421 has 4 divisors (see below), whose sum is σ = 246144. Its totient is φ = 230700.

The previous prime is 238417. The next prime is 238423. The reversal of 238421 is 124832.

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 a cyclic number.

It is not a de Polignac number, because 238421 - 2² = 238417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238393 and 238402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238423) 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, 3815 + ... + 3876.

It is an arithmetic number, because the mean of its divisors is an integer number (61536).

2²³⁸⁴²¹ is an apocalyptic number.

It is an amenable number.

238421 is a deficient number, since it is larger than the sum of its proper divisors (7723).

238421 is an equidigital number, since it uses as much as digits as its factorization.

238421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7722.

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

The square root of 238421 is about 488.2837289937. The cubic root of 238421 is about 62.0080634674.

The spelling of 238421 in words is "two hundred thirty-eight thousand, four hundred twenty-one".