1268849 has 2 divisors, whose sum is σ = 1268850. Its totient is φ = 1268848.

The previous prime is 1268843. The next prime is 1268867. The reversal of 1268849 is 9488621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 628849 = 800^2 + 793^2 .

It is an emirp because it is prime and its reverse (9488621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1268849 - 2⁸ = 1268593 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1268843) 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 as a sum of consecutive naturals, namely, 634424 + 634425.

It is an arithmetic number, because the mean of its divisors is an integer number (634425).

2^1268849 is an apocalyptic number.

It is an amenable number.

1268849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268849 is an equidigital number, since it uses as much as digits as its factorization.

1268849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 1268849 is about 1126.4319775290. The cubic root of 1268849 is about 108.2604880436.

The spelling of 1268849 in words is "one million, two hundred sixty-eight thousand, eight hundred forty-nine".