1281873 has 16 divisors (see below), whose sum is σ = 1844480. Its totient is φ = 789264.

The previous prime is 1281871. The next prime is 1281883. The reversal of 1281873 is 3781821.

It is a happy number.

It is not a de Polignac number, because 1281873 - 2¹ = 1281871 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281873.

It is not an unprimeable number, because it can be changed into a prime (1281871) 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 15 ways as a sum of consecutive naturals, for example, 2190 + ... + 2712.

It is an arithmetic number, because the mean of its divisors is an integer number (115280).

2^1281873 is an apocalyptic number.

It is an amenable number.

1281873 is a deficient number, since it is larger than the sum of its proper divisors (562607).

1281873 is a wasteful number, since it uses less digits than its factorization.

1281873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 2688, while the sum is 30.

The square root of 1281873 is about 1132.1983041853. The cubic root of 1281873 is about 108.6296382720.

The spelling of 1281873 in words is "one million, two hundred eighty-one thousand, eight hundred seventy-three".