1285648 has 40 divisors (see below), whose sum is σ = 3069248. Its totient is φ = 508032.

The previous prime is 1285633. The next prime is 1285649. The reversal of 1285648 is 8465821.

It is not an unprimeable number, because it can be changed into a prime (1285649) 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, 1015 + ... + 1897.

2^1285648 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 1285648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534624).

1285648 is an abundant number, since it is smaller than the sum of its proper divisors (1783600).

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

1285648 is a wasteful number, since it uses less digits than its factorization.

1285648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 905 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 1285648 is about 1133.8641893984. The cubic root of 1285648 is about 108.7361685849.

It can be divided in two parts, 128 and 5648, that added together give a square (5776 = 76²).

The spelling of 1285648 in words is "one million, two hundred eighty-five thousand, six hundred forty-eight".