256127539 has 2 divisors, whose sum is σ = 256127540. Its totient is φ = 256127538.

The previous prime is 256127519. The next prime is 256127561. The reversal of 256127539 is 935721652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256127539 - 2¹⁷ = 255996467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256127519) 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, 128063769 + 128063770.

It is an arithmetic number, because the mean of its divisors is an integer number (128063770).

Almost surely, 2^256127539 is an apocalyptic number.

256127539 is a deficient number, since it is larger than the sum of its proper divisors (1).

256127539 is an equidigital number, since it uses as much as digits as its factorization.

256127539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 256127539 is about 16003.9850974687. The cubic root of 256127539 is about 635.0658488763.

The spelling of 256127539 in words is "two hundred fifty-six million, one hundred twenty-seven thousand, five hundred thirty-nine".