438123 has 16 divisors (see below), whose sum is σ = 690176. Its totient is φ = 241920.

The previous prime is 438091. The next prime is 438131. The reversal of 438123 is 321834.

It is a happy number.

It is not a de Polignac number, because 438123 - 2⁵ = 438091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 a self number, because there is not a number n which added to its sum of digits gives 438123.

It is not an unprimeable number, because it can be changed into a prime (438133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315 + ... + 987.

It is an arithmetic number, because the mean of its divisors is an integer number (43136).

2⁴³⁸¹²³ is an apocalyptic number.

438123 is a deficient number, since it is larger than the sum of its proper divisors (252053).

438123 is a wasteful number, since it uses less digits than its factorization.

438123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714.

The product of its digits is 576, while the sum is 21.

The square root of 438123 is about 661.9086039628. The cubic root of 438123 is about 75.9507413953.

Adding to 438123 its reverse (321834), we get a palindrome (759957).

It can be divided in two parts, 438 and 123, that added together give a triangular number (561 = T₃₃).

The spelling of 438123 in words is "four hundred thirty-eight thousand, one hundred twenty-three".