1303123105 has 4 divisors (see below), whose sum is σ = 1563747732. Its totient is φ = 1042498480.

The previous prime is 1303123097. The next prime is 1303123111. The reversal of 1303123105 is 5013213031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 257506209 + 1045616896 = 16047^2 + 32336^2 .

It is not a de Polignac number, because 1303123105 - 2³ = 1303123097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130312306 + ... + 130312315.

It is an arithmetic number, because the mean of its divisors is an integer number (390936933).

Almost surely, 2^1303123105 is an apocalyptic number.

It is an amenable number.

1303123105 is a deficient number, since it is larger than the sum of its proper divisors (260624627).

1303123105 is an equidigital number, since it uses as much as digits as its factorization.

1303123105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260624626.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1303123105 is about 36098.7964480812. The cubic root of 1303123105 is about 1092.2661673344.

Adding to 1303123105 its reverse (5013213031), we get a palindrome (6316336136).

The spelling of 1303123105 in words is "one billion, three hundred three million, one hundred twenty-three thousand, one hundred five".