256064 has 14 divisors (see below), whose sum is σ = 508254. Its totient is φ = 128000.

The previous prime is 256057. The next prime is 256079. The reversal of 256064 is 460652.

It can be written as a sum of positive squares in only one way, i.e., 153664 + 102400 = 392^2 + 320^2 .

It is an Ulam number.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256064.

It is an unprimeable number.

256064 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1937 + ... + 2064.

2²⁵⁶⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

256064 is a deficient number, since it is larger than the sum of its proper divisors (252190).

256064 is an equidigital number, since it uses as much as digits as its factorization.

256064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013 (or 4003 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 256064 is about 506.0276672278. The cubic root of 256064 is about 63.5013329747.

The spelling of 256064 in words is "two hundred fifty-six thousand, sixty-four".