1305475081 has 2 divisors, whose sum is σ = 1305475082. Its totient is φ = 1305475080.

The previous prime is 1305475057. The next prime is 1305475097. The reversal of 1305475081 is 1805745031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755150400 + 550324681 = 27480^2 + 23459^2 .

It is an emirp because it is prime and its reverse (1805745031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1305475081 - 2²³ = 1297086473 is a prime.

It is a super-2 number, since 2×1305475081² = 3408530374223913122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1305472081) 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, 652737540 + 652737541.

It is an arithmetic number, because the mean of its divisors is an integer number (652737541).

Almost surely, 2^1305475081 is an apocalyptic number.

It is an amenable number.

1305475081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305475081 is an equidigital number, since it uses as much as digits as its factorization.

1305475081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 1305475081 is about 36131.3586929692. The cubic root of 1305475081 is about 1092.9229074851.

The spelling of 1305475081 in words is "one billion, three hundred five million, four hundred seventy-five thousand, eighty-one".