1289284 has 12 divisors (see below), whose sum is σ = 2271724. Its totient is φ = 640224.

The previous prime is 1289273. The next prime is 1289287. The reversal of 1289284 is 4829821.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 770884 = 720^2 + 878^2 .

It is not an unprimeable number, because it can be changed into a prime (1289287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399 + ... + 1654.

2^1289284 is an apocalyptic number.

It is an amenable number.

1289284 is a deficient number, since it is larger than the sum of its proper divisors (982440).

1289284 is a wasteful number, since it uses less digits than its factorization.

1289284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214 (or 2212 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 1289284 is about 1135.4664239862. The cubic root of 1289284 is about 108.8385793477.

The spelling of 1289284 in words is "one million, two hundred eighty-nine thousand, two hundred eighty-four".