1281696 has 72 divisors (see below), whose sum is σ = 3689280. Its totient is φ = 389376.

The previous prime is 1281691. The next prime is 1281697. The reversal of 1281696 is 6961821.

It is not an unprimeable number, because it can be changed into a prime (1281691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16185 + ... + 16263.

It is an arithmetic number, because the mean of its divisors is an integer number (51240).

2^1281696 is an apocalyptic number.

1281696 is a gapful number since it is divisible by the number (16) 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 1281696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1844640).

1281696 is an abundant number, since it is smaller than the sum of its proper divisors (2407584).

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

1281696 is a wasteful number, since it uses less digits than its factorization.

1281696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 97 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 1281696 is about 1132.1201349680. The cubic root of 1281696 is about 108.6246382106.

The spelling of 1281696 in words is "one million, two hundred eighty-one thousand, six hundred ninety-six".