438161 has 6 divisors (see below), whose sum is σ = 454662. Its totient is φ = 422240.

The previous prime is 438143. The next prime is 438169. The reversal of 438161 is 161834.

It can be written as a sum of positive squares in 3 ways, for example, as 40000 + 398161 = 200^2 + 631^2 .

It is not a de Polignac number, because 438161 - 2¹⁰ = 437137 is a prime.

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

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (438169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581 + ... + 1101.

It is an arithmetic number, because the mean of its divisors is an integer number (75777).

2⁴³⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

438161 is a deficient number, since it is larger than the sum of its proper divisors (16501).

438161 is an equidigital number, since it uses as much as digits as its factorization.

438161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 550 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 438161 is about 661.9373082098. The cubic root of 438161 is about 75.9529371598.

Adding to 438161 its reverse (161834), we get a palindrome (599995).

The spelling of 438161 in words is "four hundred thirty-eight thousand, one hundred sixty-one".