256210 has 8 divisors (see below), whose sum is σ = 461196. Its totient is φ = 102480.

The previous prime is 256199. The next prime is 256211. The reversal of 256210 is 12652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 241081 + 15129 = 491^2 + 123^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (256211) by changing a digit.

256210 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12801 + ... + 12820.

2²⁵⁶²¹⁰ is an apocalyptic number.

256210 is a deficient number, since it is larger than the sum of its proper divisors (204986).

256210 is a wasteful number, since it uses less digits than its factorization.

256210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25628.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 256210 is about 506.1719075571. The cubic root of 256210 is about 63.5133995324.

Adding to 256210 its reverse (12652), we get a palindrome (268862).

The spelling of 256210 in words is "two hundred fifty-six thousand, two hundred ten".