1285043912 has 16 divisors (see below), whose sum is σ = 2428431360. Its totient is φ = 637462224.

The previous prime is 1285043897. The next prime is 1285043917. The reversal of 1285043912 is 2193405821.

It is not an unprimeable number, because it can be changed into a prime (1285043917) 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 3 ways as a sum of consecutive naturals, for example, 631388 + ... + 633419.

It is an arithmetic number, because the mean of its divisors is an integer number (151776960).

Almost surely, 2^1285043912 is an apocalyptic number.

It is an amenable number.

1285043912 is a deficient number, since it is larger than the sum of its proper divisors (1143387448).

1285043912 is a wasteful number, since it uses less digits than its factorization.

1285043912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264940 (or 1264936 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1285043912 is about 35847.5091463828. The cubic root of 1285043912 is about 1087.1913527941.

The spelling of 1285043912 in words is "one billion, two hundred eighty-five million, forty-three thousand, nine hundred twelve".