1285124008 has 64 divisors (see below), whose sum is σ = 2881267200. Its totient is φ = 525857280.

The previous prime is 1285123999. The next prime is 1285124021. The reversal of 1285124008 is 8004215821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101958 + ... + 113866.

It is an arithmetic number, because the mean of its divisors is an integer number (45019800).

Almost surely, 2^1285124008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285124008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440633600).

1285124008 is an abundant number, since it is smaller than the sum of its proper divisors (1596143192).

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

1285124008 is a wasteful number, since it uses less digits than its factorization.

1285124008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12010 (or 12006 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 1285124008 is about 35848.6263056201. The cubic root of 1285124008 is about 1087.2139403152.

Adding to 1285124008 its reverse (8004215821), we get a palindrome (9289339829).

The spelling of 1285124008 in words is "one billion, two hundred eighty-five million, one hundred twenty-four thousand, eight".