1281996 has 36 divisors (see below), whose sum is σ = 3276000. Its totient is φ = 422688.

The previous prime is 1281983. The next prime is 1282007. The reversal of 1281996 is 6991821.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1281996.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5245 + ... + 5483.

It is an arithmetic number, because the mean of its divisors is an integer number (91000).

2^1281996 is an apocalyptic number.

It is an amenable number.

1281996 is an abundant number, since it is smaller than the sum of its proper divisors (1994004).

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

1281996 is a wasteful number, since it uses less digits than its factorization.

1281996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 393 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1281996 is about 1132.2526219886. The cubic root of 1281996 is about 108.6331126198.

The spelling of 1281996 in words is "one million, two hundred eighty-one thousand, nine hundred ninety-six".