1288673 has 8 divisors (see below), whose sum is σ = 1370280. Its totient is φ = 1209600.

The previous prime is 1288657. The next prime is 1288691. The reversal of 1288673 is 3768821.

It can be written as a sum of positive squares in 4 ways, for example, as 85264 + 1203409 = 292^2 + 1097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1288673 - 2⁴ = 1288657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1288603) 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 7 ways as a sum of consecutive naturals, for example, 473 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (171285).

2^1288673 is an apocalyptic number.

It is an amenable number.

1288673 is a deficient number, since it is larger than the sum of its proper divisors (81607).

1288673 is a wasteful number, since it uses less digits than its factorization.

1288673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267.

The product of its digits is 16128, while the sum is 35.

The square root of 1288673 is about 1135.1973396727. The cubic root of 1288673 is about 108.8213835295.

The spelling of 1288673 in words is "one million, two hundred eighty-eight thousand, six hundred seventy-three".