438145 has 4 divisors (see below), whose sum is σ = 525780. Its totient is φ = 350512.

The previous prime is 438143. The next prime is 438169. The reversal of 438145 is 541834.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69696 + 368449 = 264^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 438145 - 2¹ = 438143 is a prime.

It is a super-3 number, since 3×438145³ = 252333455309695875, which contains 333 as substring.

It is an Ulam number.

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

It is not an unprimeable number, because it can be changed into a prime (438143) 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, 43810 + ... + 43819.

It is an arithmetic number, because the mean of its divisors is an integer number (131445).

2⁴³⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

438145 is a deficient number, since it is larger than the sum of its proper divisors (87635).

438145 is an equidigital number, since it uses as much as digits as its factorization.

438145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87634.

The product of its digits is 1920, while the sum is 25.

The square root of 438145 is about 661.9252223628. The cubic root of 438145 is about 75.9520126428.

Adding to 438145 its reverse (541834), we get a palindrome (979979).

The spelling of 438145 in words is "four hundred thirty-eight thousand, one hundred forty-five".