256225 has 12 divisors (see below), whose sum is σ = 327484. Its totient is φ = 198720.

The previous prime is 256219. The next prime is 256279. The reversal of 256225 is 522652.

It can be written as a sum of positive squares in 6 ways, for example, as 2209 + 254016 = 47^2 + 504^2 .

It is not a de Polignac number, because 256225 - 2⁹ = 255713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256196 and 256205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 787 + ... + 1063.

2²⁵⁶²²⁵ is an apocalyptic number.

256225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256225 is a deficient number, since it is larger than the sum of its proper divisors (71259).

256225 is a wasteful number, since it uses less digits than its factorization.

256225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 319 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 256225 is about 506.1867244407. The cubic root of 256225 is about 63.5146389876.

Subtracting from 256225 its product of digits (1200), we obtain a square (255025 = 505²).

Adding to 256225 its reverse (522652), we get a palindrome (778877).

It can be divided in two parts, 256 and 225, that multiplied together give a square (57600 = 240²).

The spelling of 256225 in words is "two hundred fifty-six thousand, two hundred twenty-five".