256106 has 4 divisors (see below), whose sum is σ = 384162. Its totient is φ = 128052.

The previous prime is 256093. The next prime is 256117. The reversal of 256106 is 601652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 198025 + 58081 = 445^2 + 241^2 .

It is an unprimeable number.

256106 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 as a sum of consecutive naturals, namely, 64025 + ... + 64028.

2²⁵⁶¹⁰⁶ is an apocalyptic number.

256106 is a deficient number, since it is larger than the sum of its proper divisors (128056).

256106 is a wasteful number, since it uses less digits than its factorization.

256106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128055.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 256106 is about 506.0691652334. The cubic root of 256106 is about 63.5048046461.

Adding to 256106 its reverse (601652), we get a palindrome (857758).

The spelling of 256106 in words is "two hundred fifty-six thousand, one hundred six".