1285968 has 40 divisors (see below), whose sum is σ = 3376768. Its totient is φ = 421632.

The previous prime is 1285943. The next prime is 1285969. The reversal of 1285968 is 8695821.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3321 + ... + 3687.

2^1285968 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 1285968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1688384).

1285968 is an abundant number, since it is smaller than the sum of its proper divisors (2090800).

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

1285968 is a wasteful number, since it uses less digits than its factorization.

1285968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 445 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 1285968 is about 1134.0052909929. The cubic root of 1285968 is about 108.7451893763.

The spelling of 1285968 in words is "one million, two hundred eighty-five thousand, nine hundred sixty-eight".