397255 has 4 divisors (see below), whose sum is σ = 476712. Its totient is φ = 317800.

The previous prime is 397253. The next prime is 397259. The reversal of 397255 is 552793.

It is a happy number.

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

It is not a de Polignac number, because 397255 - 2¹ = 397253 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 3³ + 9² + 2¹² + 7⁴ + 5² + 5⁸ .

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397253) 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 3 ways as a sum of consecutive naturals, for example, 39721 + ... + 39730.

It is an arithmetic number, because the mean of its divisors is an integer number (119178).

2³⁹⁷²⁵⁵ is an apocalyptic number.

397255 is a deficient number, since it is larger than the sum of its proper divisors (79457).

397255 is an equidigital number, since it uses as much as digits as its factorization.

397255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79456.

The product of its digits is 9450, while the sum is 31.

The square root of 397255 is about 630.2816830592. The cubic root of 397255 is about 73.5116985097.

The spelling of 397255 in words is "three hundred ninety-seven thousand, two hundred fifty-five".