1281185083 has 2 divisors, whose sum is σ = 1281185084. Its totient is φ = 1281185082.

The previous prime is 1281185071. The next prime is 1281185137. The reversal of 1281185083 is 3805811821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281185083 - 2¹⁷ = 1281054011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1281185023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640592541 + 640592542.

It is an arithmetic number, because the mean of its divisors is an integer number (640592542).

Almost surely, 2^1281185083 is an apocalyptic number.

1281185083 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281185083 is an equidigital number, since it uses as much as digits as its factorization.

1281185083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 1281185083 is about 35793.6458467142. The cubic root of 1281185083 is about 1086.1020276719.

The spelling of 1281185083 in words is "one billion, two hundred eighty-one million, one hundred eighty-five thousand, eighty-three".