1288769 has 2 divisors, whose sum is σ = 1288770. Its totient is φ = 1288768.

The previous prime is 1288733. The next prime is 1288783. The reversal of 1288769 is 9678821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 238144 = 1025^2 + 488^2 .

It is an emirp because it is prime and its reverse (9678821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1288769 - 2⁸ = 1288513 is a prime.

It is a super-2 number, since 2×1288769² = 3321851070722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1288709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644384 + 644385.

It is an arithmetic number, because the mean of its divisors is an integer number (644385).

2^1288769 is an apocalyptic number.

It is an amenable number.

1288769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288769 is an equidigital number, since it uses as much as digits as its factorization.

1288769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 1288769 is about 1135.2396222825. The cubic root of 1288769 is about 108.8240856873.

The spelling of 1288769 in words is "one million, two hundred eighty-eight thousand, seven hundred sixty-nine".