1289716 has 6 divisors (see below), whose sum is σ = 2257010. Its totient is φ = 644856.

The previous prime is 1289713. The next prime is 1289731. The reversal of 1289716 is 6179821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 633616 = 810^2 + 796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161211 + ... + 161218.

2^1289716 is an apocalyptic number.

It is an amenable number.

1289716 is a deficient number, since it is larger than the sum of its proper divisors (967294).

1289716 is a wasteful number, since it uses less digits than its factorization.

1289716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322433 (or 322431 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 1289716 is about 1135.6566382494. The cubic root of 1289716 is about 108.8507341602.

The spelling of 1289716 in words is "one million, two hundred eighty-nine thousand, seven hundred sixteen".