1026809 has 8 divisors (see below), whose sum is σ = 1198848. Its totient is φ = 861120.

The previous prime is 1026799. The next prime is 1026811. The reversal of 1026809 is 9086201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1026809 - 2¹⁶ = 961273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1026829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1232 + ... + 1889.

It is an arithmetic number, because the mean of its divisors is an integer number (149856).

2^1026809 is an apocalyptic number.

It is an amenable number.

1026809 is a deficient number, since it is larger than the sum of its proper divisors (172039).

1026809 is an equidigital number, since it uses as much as digits as its factorization.

1026809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1026809 is about 1013.3158441473. The cubic root of 1026809 is about 100.8857643829.

It can be divided in two parts, 102680 and 9, that multiplied together give a triangular number (924120 = T₁₃₅₉).

The spelling of 1026809 in words is "one million, twenty-six thousand, eight hundred nine".