1285275684 has 144 divisors (see below), whose sum is σ = 4029963840. Its totient is φ = 314173440.

The previous prime is 1285275683. The next prime is 1285275689. The reversal of 1285275684 is 4865725821.

It is not an unprimeable number, because it can be changed into a prime (1285275683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104112 + ... + 115800.

It is an arithmetic number, because the mean of its divisors is an integer number (27985860).

Almost surely, 2^1285275684 is an apocalyptic number.

1285275684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285275684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014981920).

1285275684 is an abundant number, since it is smaller than the sum of its proper divisors (2744688156).

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

1285275684 is a wasteful number, since it uses less digits than its factorization.

1285275684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11738 (or 11729 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 48.

The square root of 1285275684 is about 35850.7417496486. The cubic root of 1285275684 is about 1087.2567112264.

The spelling of 1285275684 in words is "one billion, two hundred eighty-five million, two hundred seventy-five thousand, six hundred eighty-four".