1305055123 has 2 divisors, whose sum is σ = 1305055124. Its totient is φ = 1305055122.

The previous prime is 1305055111. The next prime is 1305055151. The reversal of 1305055123 is 3215505031.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305055123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305055723) by changing a digit.

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 as a sum of consecutive naturals, namely, 652527561 + 652527562.

It is an arithmetic number, because the mean of its divisors is an integer number (652527562).

Almost surely, 2^1305055123 is an apocalyptic number.

1305055123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305055123 is an equidigital number, since it uses as much as digits as its factorization.

1305055123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 1305055123 is about 36125.5466809846. The cubic root of 1305055123 is about 1092.8057008706.

The spelling of 1305055123 in words is "one billion, three hundred five million, fifty-five thousand, one hundred twenty-three".