1305109 has 4 divisors (see below), whose sum is σ = 1405516. Its totient is φ = 1204704.

The previous prime is 1305097. The next prime is 1305121. The reversal of 1305109 is 9015031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9015031 = 2731 ⋅3301.

It is an interprime number because it is at equal distance from previous prime (1305097) and next prime (1305121).

It can be written as a sum of positive squares in 2 ways, for example, as 396900 + 908209 = 630^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305109 - 2⁷ = 1304981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305149) 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 in 3 ways as a sum of consecutive naturals, for example, 50184 + ... + 50209.

It is an arithmetic number, because the mean of its divisors is an integer number (351379).

2^1305109 is an apocalyptic number.

It is an amenable number.

1305109 is a deficient number, since it is larger than the sum of its proper divisors (100407).

1305109 is a wasteful number, since it uses less digits than its factorization.

1305109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100406.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 1305109 is about 1142.4136728874. The cubic root of 1305109 is about 109.2820738877.

The spelling of 1305109 in words is "one million, three hundred five thousand, one hundred nine".