1230109305 has 24 divisors (see below), whose sum is σ = 2077224192. Its totient is φ = 621526176.

The previous prime is 1230109291. The next prime is 1230109313. The reversal of 1230109305 is 5039010321.

It is a happy number.

It is not a de Polignac number, because 1230109305 - 2¹⁹ = 1229585017 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108169 + ... + 118998.

It is an arithmetic number, because the mean of its divisors is an integer number (86551008).

Almost surely, 2^1230109305 is an apocalyptic number.

1230109305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1230109305 is a deficient number, since it is larger than the sum of its proper divisors (847114887).

1230109305 is a wasteful number, since it uses less digits than its factorization.

1230109305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227213 (or 227194 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 1230109305 is about 35072.9141218690. The cubic root of 1230109305 is about 1071.4730069317.

Adding to 1230109305 its reverse (5039010321), we get a palindrome (6269119626).

The spelling of 1230109305 in words is "one billion, two hundred thirty million, one hundred nine thousand, three hundred five".