1281968 has 20 divisors (see below), whose sum is σ = 2615160. Its totient is φ = 607104.

The previous prime is 1281961. The next prime is 1281971. The reversal of 1281968 is 8691821.

It is not an unprimeable number, because it can be changed into a prime (1281961) 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 3 ways as a sum of consecutive naturals, for example, 1805 + ... + 2412.

It is an arithmetic number, because the mean of its divisors is an integer number (130758).

2^1281968 is an apocalyptic number.

It is an amenable number.

1281968 is an abundant number, since it is smaller than the sum of its proper divisors (1333192).

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

1281968 is a wasteful number, since it uses less digits than its factorization.

1281968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244 (or 4238 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 1281968 is about 1132.2402571893. The cubic root of 1281968 is about 108.6323217309.

The spelling of 1281968 in words is "one million, two hundred eighty-one thousand, nine hundred sixty-eight".