1056287681 has 2 divisors, whose sum is σ = 1056287682. Its totient is φ = 1056287680.

The previous prime is 1056287641. The next prime is 1056287753. The reversal of 1056287681 is 1867826501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031437456 + 24850225 = 32116^2 + 4985^2 .

It is an emirp because it is prime and its reverse (1867826501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1056287681 - 2¹⁰ = 1056286657 is a prime.

It is a super-2 number, since 2×1056287681² = 2231487330064715522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056287621) 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, 528143840 + 528143841.

It is an arithmetic number, because the mean of its divisors is an integer number (528143841).

Almost surely, 2^1056287681 is an apocalyptic number.

It is an amenable number.

1056287681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056287681 is an equidigital number, since it uses as much as digits as its factorization.

1056287681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1056287681 is about 32500.5797025222. The cubic root of 1056287681 is about 1018.4211383298.

The spelling of 1056287681 in words is "one billion, fifty-six million, two hundred eighty-seven thousand, six hundred eighty-one".