256249 has 4 divisors (see below), whose sum is σ = 292864. Its totient is φ = 219636.

The previous prime is 256219. The next prime is 256279. The reversal of 256249 is 942652.

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 an interprime number because it is at equal distance from previous prime (256219) and next prime (256279).

It is a cyclic number.

It is not a de Polignac number, because 256249 - 2⁷ = 256121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18297 + ... + 18310.

It is an arithmetic number, because the mean of its divisors is an integer number (73216).

2²⁵⁶²⁴⁹ is an apocalyptic number.

It is an amenable number.

256249 is a deficient number, since it is larger than the sum of its proper divisors (36615).

256249 is an equidigital number, since it uses as much as digits as its factorization.

256249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36614.

The product of its digits is 4320, while the sum is 28.

The square root of 256249 is about 506.2104305524. The cubic root of 256249 is about 63.5166220152.

It can be divided in two parts, 256 and 249, that added together give a palindrome (505).

The spelling of 256249 in words is "two hundred fifty-six thousand, two hundred forty-nine".