398105 has 4 divisors (see below), whose sum is σ = 477732. Its totient is φ = 318480.

The previous prime is 398087. The next prime is 398113. The reversal of 398105 is 501893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501893 = 7 ⋅71699.

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 290521 = 328^2 + 539^2 .

It is not a de Polignac number, because 398105 - 2⁸ = 397849 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39806 + ... + 39815.

It is an arithmetic number, because the mean of its divisors is an integer number (119433).

2³⁹⁸¹⁰⁵ is an apocalyptic number.

It is an amenable number.

398105 is a deficient number, since it is larger than the sum of its proper divisors (79627).

398105 is an equidigital number, since it uses as much as digits as its factorization.

398105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79626.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 398105 is about 630.9556244301. The cubic root of 398105 is about 73.5640917505.

Adding to 398105 its reverse (501893), we get a palindrome (899998).

The spelling of 398105 in words is "three hundred ninety-eight thousand, one hundred five".