1232809 has 2 divisors, whose sum is σ = 1232810. Its totient is φ = 1232808.

The previous prime is 1232801. The next prime is 1232831. The reversal of 1232809 is 9082321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 222784 = 1005^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232809 - 2³ = 1232801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1232801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616404 + 616405.

It is an arithmetic number, because the mean of its divisors is an integer number (616405).

2^1232809 is an apocalyptic number.

It is an amenable number.

1232809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232809 is an equidigital number, since it uses as much as digits as its factorization.

1232809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1232809 is about 1110.3193234381. The cubic root of 1232809 is about 107.2256280618.

The spelling of 1232809 in words is "one million, two hundred thirty-two thousand, eight hundred nine".