1248809 has 2 divisors, whose sum is σ = 1248810. Its totient is φ = 1248808.

The previous prime is 1248799. The next prime is 1248829. The reversal of 1248809 is 9088421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 38809 = 1100^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248809 - 2⁸ = 1248553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1248829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624404 + 624405.

It is an arithmetic number, because the mean of its divisors is an integer number (624405).

2^1248809 is an apocalyptic number.

It is an amenable number.

1248809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248809 is an equidigital number, since it uses as much as digits as its factorization.

1248809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1248809 is about 1117.5012304244. The cubic root of 1248809 is about 107.6875112071.

The spelling of 1248809 in words is "one million, two hundred forty-eight thousand, eight hundred nine".