256011241 has 2 divisors, whose sum is σ = 256011242. Its totient is φ = 256011240.

The previous prime is 256011233. The next prime is 256011307. The reversal of 256011241 is 142110652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213043216 + 42968025 = 14596^2 + 6555^2 .

It is a cyclic number.

It is not a de Polignac number, because 256011241 - 2³ = 256011233 is a prime.

It is not a weakly prime, because it can be changed into another prime (256011641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128005620 + 128005621.

It is an arithmetic number, because the mean of its divisors is an integer number (128005621).

Almost surely, 2^256011241 is an apocalyptic number.

It is an amenable number.

256011241 is a deficient number, since it is larger than the sum of its proper divisors (1).

256011241 is an equidigital number, since it uses as much as digits as its factorization.

256011241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 256011241 is about 16000.3512773939. The cubic root of 256011241 is about 634.9697143883.

Adding to 256011241 its reverse (142110652), we get a palindrome (398121893).

The spelling of 256011241 in words is "two hundred fifty-six million, eleven thousand, two hundred forty-one".