1281705283 has 2 divisors, whose sum is σ = 1281705284. Its totient is φ = 1281705282.

The previous prime is 1281705263. The next prime is 1281705289. The reversal of 1281705283 is 3825071821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1281705283 - 2¹³ = 1281697091 is a prime.

It is a super-2 number, since 2×1281705283² = 3285536864940220178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1281705289) 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, 640852641 + 640852642.

It is an arithmetic number, because the mean of its divisors is an integer number (640852642).

Almost surely, 2^1281705283 is an apocalyptic number.

1281705283 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281705283 is an equidigital number, since it uses as much as digits as its factorization.

1281705283 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1281705283 is about 35800.9117621325. The cubic root of 1281705283 is about 1086.2490045690.

The spelling of 1281705283 in words is "one billion, two hundred eighty-one million, seven hundred five thousand, two hundred eighty-three".