10275781 has 2 divisors, whose sum is σ = 10275782. Its totient is φ = 10275780.

The previous prime is 10275761. The next prime is 10275817. The reversal of 10275781 is 18757201.

It is a happy number.

Together with next prime (10275817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8673025 + 1602756 = 2945^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 10275781 - 2⁷ = 10275653 is a prime.

It is a super-2 number, since 2×10275781² = 211183350319922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10275731) 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, 5137890 + 5137891.

It is an arithmetic number, because the mean of its divisors is an integer number (5137891).

Almost surely, 2^10275781 is an apocalyptic number.

It is an amenable number.

10275781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10275781 is an equidigital number, since it uses as much as digits as its factorization.

10275781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 10275781 is about 3205.5859058837. The cubic root of 10275781 is about 217.4060438858.

The spelling of 10275781 in words is "ten million, two hundred seventy-five thousand, seven hundred eighty-one".