438245 has 4 divisors (see below), whose sum is σ = 525900. Its totient is φ = 350592.

The previous prime is 438241. The next prime is 438253. The reversal of 438245 is 542834.

It is a Cunningham number, because it is equal to 662²+1.

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 158404 + 279841 = 398^2 + 529^2 .

It is a cyclic number.

It is not a de Polignac number, because 438245 - 2² = 438241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438241) 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 3 ways as a sum of consecutive naturals, for example, 43820 + ... + 43829.

It is an arithmetic number, because the mean of its divisors is an integer number (131475).

2⁴³⁸²⁴⁵ is an apocalyptic number.

It is an amenable number.

438245 is a deficient number, since it is larger than the sum of its proper divisors (87655).

438245 is an equidigital number, since it uses as much as digits as its factorization.

438245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87654.

The product of its digits is 3840, while the sum is 26.

The square root of 438245 is about 662.0007552866. Note that the first 3 decimals coincide. The cubic root of 438245 is about 75.9577905044.

The spelling of 438245 in words is "four hundred thirty-eight thousand, two hundred forty-five".