1305055205 has 16 divisors (see below), whose sum is σ = 1619025408. Its totient is φ = 1008840000.

The previous prime is 1305055177. The next prime is 1305055207. The reversal of 1305055205 is 5025505031.

It is not a de Polignac number, because 1305055205 - 2²⁰ = 1304006629 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 (1305055207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102650 + ... + 114660.

It is an arithmetic number, because the mean of its divisors is an integer number (101189088).

Almost surely, 2^1305055205 is an apocalyptic number.

It is an amenable number.

1305055205 is a deficient number, since it is larger than the sum of its proper divisors (313970203).

1305055205 is a wasteful number, since it uses less digits than its factorization.

1305055205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12748.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 1305055205 is about 36125.5478159155. The cubic root of 1305055205 is about 1092.8057237585.

The spelling of 1305055205 in words is "one billion, three hundred five million, fifty-five thousand, two hundred five".