1268011985 has 8 divisors (see below), whose sum is σ = 1535080680. Its totient is φ = 1005432064.

The previous prime is 1268011967. The next prime is 1268012021. The reversal of 1268011985 is 5891108621.

It can be written as a sum of positive squares in 4 ways, for example, as 56415121 + 1211596864 = 7511^2 + 34808^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1268011985 - 2¹⁸ = 1267749841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121570 + ... + 1122699.

It is an arithmetic number, because the mean of its divisors is an integer number (191885085).

Almost surely, 2^1268011985 is an apocalyptic number.

It is an amenable number.

1268011985 is a deficient number, since it is larger than the sum of its proper divisors (267068695).

1268011985 is a wasteful number, since it uses less digits than its factorization.

1268011985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244387.

The product of its (nonzero) digits is 34560, while the sum is 41.

The square root of 1268011985 is about 35609.1559152980. The cubic root of 1268011985 is about 1082.3667759676.

The spelling of 1268011985 in words is "one billion, two hundred sixty-eight million, eleven thousand, nine hundred eighty-five".