1285001868 has 24 divisors (see below), whose sum is σ = 2998938880. Its totient is φ = 428248080.

The previous prime is 1285001867. The next prime is 1285001873. The reversal of 1285001868 is 8681005821.

It is not an unprimeable number, because it can be changed into a prime (1285001867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87753 + ... + 101343.

Almost surely, 2^1285001868 is an apocalyptic number.

It is an amenable number.

1285001868 is an abundant number, since it is smaller than the sum of its proper divisors (1713937012).

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

1285001868 is a wasteful number, since it uses less digits than its factorization.

1285001868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21477 (or 21475 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 1285001868 is about 35846.9227131144. The cubic root of 1285001868 is about 1087.1794957747.

The spelling of 1285001868 in words is "one billion, two hundred eighty-five million, one thousand, eight hundred sixty-eight".