1026256817 has 2 divisors, whose sum is σ = 1026256818. Its totient is φ = 1026256816.

The previous prime is 1026256811. The next prime is 1026256831. The reversal of 1026256817 is 7186526201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 930921121 + 95335696 = 30511^2 + 9764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026256817 - 2¹⁰ = 1026255793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1026256811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513128408 + 513128409.

It is an arithmetic number, because the mean of its divisors is an integer number (513128409).

Almost surely, 2^1026256817 is an apocalyptic number.

It is an amenable number.

1026256817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026256817 is an equidigital number, since it uses as much as digits as its factorization.

1026256817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1026256817 is about 32035.2433579019. The cubic root of 1026256817 is about 1008.6767682783.

The spelling of 1026256817 in words is "one billion, twenty-six million, two hundred fifty-six thousand, eight hundred seventeen".