1285834512 has 60 divisors (see below), whose sum is σ = 3353274960. Its totient is φ = 424558656.

The previous prime is 1285834447. The next prime is 1285834513. The reversal of 1285834512 is 2154385821.

It is not an unprimeable number, because it can be changed into a prime (1285834513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2928789 + ... + 2929227.

It is an arithmetic number, because the mean of its divisors is an integer number (55887916).

Almost surely, 2^1285834512 is an apocalyptic number.

1285834512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285834512 is an abundant number, since it is smaller than the sum of its proper divisors (2067440448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285834512 is an equidigital number, since it uses as much as digits as its factorization.

1285834512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 583 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 1285834512 is about 35858.5347162987. The cubic root of 1285834512 is about 1087.4142653511.

The spelling of 1285834512 in words is "one billion, two hundred eighty-five million, eight hundred thirty-four thousand, five hundred twelve".