1285727275 has 24 divisors (see below), whose sum is σ = 1823449760. Its totient is φ = 880968960.

The previous prime is 1285727237. The next prime is 1285727279. The reversal of 1285727275 is 5727275821.

It is not a de Polignac number, because 1285727275 - 2⁹ = 1285726763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285727279) 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 in 23 ways as a sum of consecutive naturals, for example, 363817 + ... + 367333.

Almost surely, 2^1285727275 is an apocalyptic number.

1285727275 is a deficient number, since it is larger than the sum of its proper divisors (537722485).

1285727275 is a wasteful number, since it uses less digits than its factorization.

1285727275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623 (or 5618 counting only the distinct ones).

The product of its digits is 548800, while the sum is 46.

The square root of 1285727275 is about 35857.0394065098. The cubic root of 1285727275 is about 1087.3840348447.

The spelling of 1285727275 in words is "one billion, two hundred eighty-five million, seven hundred twenty-seven thousand, two hundred seventy-five".