1260320805 has 24 divisors (see below), whose sum is σ = 2185417728. Its totient is φ = 671906016.

The previous prime is 1260320801. The next prime is 1260320813. The reversal of 1260320805 is 5080230621.

1260320805 is a `hidden beast` number, since 1 + 260 + 320 + 80 + 5 = 666.

1260320805 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1260320805 - 2² = 1260320801 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260320801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173884 + ... + 180986.

It is an arithmetic number, because the mean of its divisors is an integer number (91059072).

Almost surely, 2^1260320805 is an apocalyptic number.

1260320805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1260320805 is a deficient number, since it is larger than the sum of its proper divisors (925096923).

1260320805 is a wasteful number, since it uses less digits than its factorization.

1260320805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11057 (or 11054 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1260320805 is about 35500.9972395143. The cubic root of 1260320805 is about 1080.1739560328.

The spelling of 1260320805 in words is "one billion, two hundred sixty million, three hundred twenty thousand, eight hundred five".