1146809 has 2 divisors, whose sum is σ = 1146810. Its totient is φ = 1146808.

The previous prime is 1146799. The next prime is 1146823. The reversal of 1146809 is 9086411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 250000 = 947^2 + 500^2 .

It is an emirp because it is prime and its reverse (9086411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1146809 - 2⁴ = 1146793 is a prime.

It is equal to p₈₉₀₇₅ and since 1146809 and 89075 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1146829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573404 + 573405.

It is an arithmetic number, because the mean of its divisors is an integer number (573405).

2^1146809 is an apocalyptic number.

It is an amenable number.

1146809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146809 is an equidigital number, since it uses as much as digits as its factorization.

1146809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1146809 is about 1070.8916845321. The cubic root of 1146809 is about 104.6719618581.

The spelling of 1146809 in words is "one million, one hundred forty-six thousand, eight hundred nine".