256141447 has 2 divisors, whose sum is σ = 256141448. Its totient is φ = 256141446.

The previous prime is 256141441. The next prime is 256141471. The reversal of 256141447 is 744141652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256141447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256141441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128070723 + 128070724.

It is an arithmetic number, because the mean of its divisors is an integer number (128070724).

Almost surely, 2^256141447 is an apocalyptic number.

256141447 is a deficient number, since it is larger than the sum of its proper divisors (1).

256141447 is an equidigital number, since it uses as much as digits as its factorization.

256141447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 256141447 is about 16004.4196083457. The cubic root of 256141447 is about 635.0773435871.

The spelling of 256141447 in words is "two hundred fifty-six million, one hundred forty-one thousand, four hundred forty-seven".