255397 has 4 divisors (see below), whose sum is σ = 257536. Its totient is φ = 253260.

The previous prime is 255383. The next prime is 255413. The reversal of 255397 is 793552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255397 - 2¹¹ = 253349 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁵ + 5 + 3¹¹ + 5⁷ + 9² + 7 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255097) 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, 879 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (64384).

2²⁵⁵³⁹⁷ is an apocalyptic number.

It is an amenable number.

255397 is a deficient number, since it is larger than the sum of its proper divisors (2139).

255397 is a wasteful number, since it uses less digits than its factorization.

255397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138.

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

The square root of 255397 is about 505.3681826154. The cubic root of 255397 is about 63.4461485697.

The spelling of 255397 in words is "two hundred fifty-five thousand, three hundred ninety-seven".