438121 has 4 divisors (see below), whose sum is σ = 461200. Its totient is φ = 415044.

The previous prime is 438091. The next prime is 438131. The reversal of 438121 is 121834.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121834 = 2 ⋅60917.

It is a cyclic number.

It is not a de Polignac number, because 438121 - 2¹³ = 429929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 23059 = 438121 / (4 + 3 + 8 + 1 + 2 + 1).

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (438131) 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, 11511 + ... + 11548.

It is an arithmetic number, because the mean of its divisors is an integer number (115300).

2⁴³⁸¹²¹ is an apocalyptic number.

It is an amenable number.

438121 is a deficient number, since it is larger than the sum of its proper divisors (23079).

438121 is a wasteful number, since it uses less digits than its factorization.

438121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23078.

The product of its digits is 192, while the sum is 19.

The square root of 438121 is about 661.9070931785. The cubic root of 438121 is about 75.9506258252.

Adding to 438121 its reverse (121834), we get a palindrome (559955).

The spelling of 438121 in words is "four hundred thirty-eight thousand, one hundred twenty-one".