256125 has 16 divisors (see below), whose sum is σ = 426816. Its totient is φ = 136400.

The previous prime is 256121. The next prime is 256129. The reversal of 256125 is 521652.

It is an interprime number because it is at equal distance from previous prime (256121) and next prime (256129).

It is not a de Polignac number, because 256125 - 2² = 256121 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (26676).

2²⁵⁶¹²⁵ is an apocalyptic number.

256125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256125 is a deficient number, since it is larger than the sum of its proper divisors (170691).

256125 is an equidigital number, since it uses as much as digits as its factorization.

256125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 691 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 256125 is about 506.0879370228. The cubic root of 256125 is about 63.5063750394.

Adding to 256125 its reverse (521652), we get a palindrome (777777).

The spelling of 256125 in words is "two hundred fifty-six thousand, one hundred twenty-five".