1285842612 has 24 divisors (see below), whose sum is σ = 3008023200. Its totient is φ = 427510816.

The previous prime is 1285842599. The next prime is 1285842619. The reversal of 1285842612 is 2162485821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285842619) 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, 133062 + ... + 142397.

It is an arithmetic number, because the mean of its divisors is an integer number (125334300).

Almost surely, 2^1285842612 is an apocalyptic number.

1285842612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285842612 is an abundant number, since it is smaller than the sum of its proper divisors (1722180588).

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

1285842612 is a wasteful number, since it uses less digits than its factorization.

1285842612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275855 (or 275853 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 1285842612 is about 35858.6476599439. The cubic root of 1285842612 is about 1087.4165487027.

The spelling of 1285842612 in words is "one billion, two hundred eighty-five million, eight hundred forty-two thousand, six hundred twelve".