256441 has 2 divisors, whose sum is σ = 256442. Its totient is φ = 256440.

The previous prime is 256423. The next prime is 256469. The reversal of 256441 is 144652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 92416 = 405^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 256441 - 2⁷ = 256313 is a prime.

It is equal to p₂₂₅₅₈ and since 256441 and 22558 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (256471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128220 + 128221.

It is an arithmetic number, because the mean of its divisors is an integer number (128221).

2²⁵⁶⁴⁴¹ is an apocalyptic number.

It is an amenable number.

256441 is a deficient number, since it is larger than the sum of its proper divisors (1).

256441 is an equidigital number, since it uses as much as digits as its factorization.

256441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 256441 is about 506.4000394945. The cubic root of 256441 is about 63.5324817803.

It can be divided in two parts, 256 and 441, that multiplied together give a square (112896 = 336²).

The spelling of 256441 in words is "two hundred fifty-six thousand, four hundred forty-one".