1281608 has 8 divisors (see below), whose sum is σ = 2403030. Its totient is φ = 640800.

The previous prime is 1281587. The next prime is 1281649. The reversal of 1281608 is 8061821.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 31684 = 1118^2 + 178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80093 + ... + 80108.

2^1281608 is an apocalyptic number.

It is an amenable number.

1281608 is a deficient number, since it is larger than the sum of its proper divisors (1121422).

1281608 is a wasteful number, since it uses less digits than its factorization.

1281608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160207 (or 160203 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1281608 is about 1132.0812691675. The cubic root of 1281608 is about 108.6221521331.

The spelling of 1281608 in words is "one million, two hundred eighty-one thousand, six hundred eight".