256057 has 2 divisors, whose sum is σ = 256058. Its totient is φ = 256056.

The previous prime is 256049. The next prime is 256079. The reversal of 256057 is 750652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249001 + 7056 = 499^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 256057 - 2³ = 256049 is a prime.

It is not a weakly prime, because it can be changed into another prime (256757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128028 + 128029.

It is an arithmetic number, because the mean of its divisors is an integer number (128029).

2²⁵⁶⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

256057 is a deficient number, since it is larger than the sum of its proper divisors (1).

256057 is an equidigital number, since it uses as much as digits as its factorization.

256057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 256057 is about 506.0207505627. The cubic root of 256057 is about 63.5007543259.

The spelling of 256057 in words is "two hundred fifty-six thousand, fifty-seven".