1268305345 has 8 divisors (see below), whose sum is σ = 1522161576. Its totient is φ = 1014514176.

The previous prime is 1268305327. The next prime is 1268305369. The reversal of 1268305345 is 5435038621.

It can be written as a sum of positive squares in 4 ways, for example, as 28772496 + 1239532849 = 5364^2 + 35207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1268305345 - 2⁷ = 1268305217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55089 + ... + 74641.

It is an arithmetic number, because the mean of its divisors is an integer number (190270197).

Almost surely, 2^1268305345 is an apocalyptic number.

It is an amenable number.

1268305345 is a deficient number, since it is larger than the sum of its proper divisors (253856231).

1268305345 is a wasteful number, since it uses less digits than its factorization.

1268305345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32531.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 1268305345 is about 35613.2748423955. The cubic root of 1268305345 is about 1082.4502395935.

The spelling of 1268305345 in words is "one billion, two hundred sixty-eight million, three hundred five thousand, three hundred forty-five".