256725 has 36 divisors (see below), whose sum is σ = 528736. Its totient is φ = 116640.

The previous prime is 256723. The next prime is 256757. The reversal of 256725 is 527652.

It is not a de Polignac number, because 256725 - 2¹ = 256723 is a prime.

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

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1494 + ... + 1656.

2²⁵⁶⁷²⁵ is an apocalyptic number.

256725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256725 is an abundant number, since it is smaller than the sum of its proper divisors (272011).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256725 is a wasteful number, since it uses less digits than its factorization.

256725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 178 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 256725 is about 506.6803726216. The cubic root of 256725 is about 63.5559265079. Note that the first 3 decimals are identical.

The spelling of 256725 in words is "two hundred fifty-six thousand, seven hundred twenty-five".