1285871611 has 2 divisors, whose sum is σ = 1285871612. Its totient is φ = 1285871610.

The previous prime is 1285871563. The next prime is 1285871633. The reversal of 1285871611 is 1161785821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285871611 - 2⁹ = 1285871099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1285871651) 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, 642935805 + 642935806.

It is an arithmetic number, because the mean of its divisors is an integer number (642935806).

Almost surely, 2^1285871611 is an apocalyptic number.

1285871611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285871611 is an equidigital number, since it uses as much as digits as its factorization.

1285871611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 40.

The square root of 1285871611 is about 35859.0520092208. The cubic root of 1285871611 is about 1087.4247233049.

The spelling of 1285871611 in words is "one billion, two hundred eighty-five million, eight hundred seventy-one thousand, six hundred eleven".