1305496085 has 4 divisors (see below), whose sum is σ = 1566595308. Its totient is φ = 1044396864.

The previous prime is 1305496081. The next prime is 1305496091. The reversal of 1305496085 is 5806945031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5806945031 = 2399 ⋅2420569.

It can be written as a sum of positive squares in 2 ways, for example, as 524684836 + 780811249 = 22906^2 + 27943^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305496085 - 2² = 1305496081 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 (1305496081) by changing a digit.

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, 130549604 + ... + 130549613.

It is an arithmetic number, because the mean of its divisors is an integer number (391648827).

Almost surely, 2^1305496085 is an apocalyptic number.

It is an amenable number.

1305496085 is a deficient number, since it is larger than the sum of its proper divisors (261099223).

1305496085 is an equidigital number, since it uses as much as digits as its factorization.

1305496085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261099222.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 1305496085 is about 36131.6493534408. The cubic root of 1305496085 is about 1092.9287688582.

The spelling of 1305496085 in words is "one billion, three hundred five million, four hundred ninety-six thousand, eighty-five".