256127497 has 2 divisors, whose sum is σ = 256127498. Its totient is φ = 256127496.

The previous prime is 256127483. The next prime is 256127503. The reversal of 256127497 is 794721652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237283216 + 18844281 = 15404^2 + 4341^2 .

It is a cyclic number.

It is not a de Polignac number, because 256127497 - 2¹¹ = 256125449 is a prime.

It is not a weakly prime, because it can be changed into another prime (256127407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128063748 + 128063749.

It is an arithmetic number, because the mean of its divisors is an integer number (128063749).

Almost surely, 2^256127497 is an apocalyptic number.

It is an amenable number.

256127497 is a deficient number, since it is larger than the sum of its proper divisors (1).

256127497 is an equidigital number, since it uses as much as digits as its factorization.

256127497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 256127497 is about 16003.9837852955. The cubic root of 256127497 is about 635.0658141635.

The spelling of 256127497 in words is "two hundred fifty-six million, one hundred twenty-seven thousand, four hundred ninety-seven".