398125 has 30 divisors (see below), whose sum is σ = 623238. Its totient is φ = 252000.

The previous prime is 398119. The next prime is 398129. The reversal of 398125 is 521893.

It can be written as a sum of positive squares in 5 ways, for example, as 233289 + 164836 = 483^2 + 406^2 .

It is not a de Polignac number, because 398125 - 2³ = 398117 is a prime.

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 398093 and 398102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398129) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 30619 + ... + 30631.

2³⁹⁸¹²⁵ is an apocalyptic number.

398125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

398125 is a deficient number, since it is larger than the sum of its proper divisors (225113).

398125 is an equidigital number, since it uses as much as digits as its factorization.

398125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47 (or 25 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 398125 is about 630.9714732062. The cubic root of 398125 is about 73.5653236342.

The spelling of 398125 in words is "three hundred ninety-eight thousand, one hundred twenty-five".