1286127885 has 16 divisors (see below), whose sum is σ = 2351776896. Its totient is φ = 587944128.

The previous prime is 1286127863. The next prime is 1286127889. The reversal of 1286127885 is 5887216821.

It is not a de Polignac number, because 1286127885 - 2⁸ = 1286127629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286127889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6124314 + ... + 6124523.

It is an arithmetic number, because the mean of its divisors is an integer number (146986056).

Almost surely, 2^1286127885 is an apocalyptic number.

1286127885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1286127885 is a deficient number, since it is larger than the sum of its proper divisors (1065649011).

1286127885 is a wasteful number, since it uses less digits than its factorization.

1286127885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12248852.

The product of its digits is 430080, while the sum is 48.

The square root of 1286127885 is about 35862.6251827721. The cubic root of 1286127885 is about 1087.4969596956.

The spelling of 1286127885 in words is "one billion, two hundred eighty-six million, one hundred twenty-seven thousand, eight hundred eighty-five".