1320291705 has 16 divisors (see below), whose sum is σ = 2180611584. Its totient is φ = 681440640.

The previous prime is 1320291697. The next prime is 1320291719. The reversal of 1320291705 is 5071920231.

1320291705 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 1320291705 - 2³ = 1320291697 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1419204 + ... + 1420133.

It is an arithmetic number, because the mean of its divisors is an integer number (136288224).

Almost surely, 2^1320291705 is an apocalyptic number.

1320291705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320291705 is a deficient number, since it is larger than the sum of its proper divisors (860319879).

1320291705 is a wasteful number, since it uses less digits than its factorization.

1320291705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839376.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1320291705 is about 36335.8184853458. The cubic root of 1320291705 is about 1097.0421098630.

The spelling of 1320291705 in words is "one billion, three hundred twenty million, two hundred ninety-one thousand, seven hundred five".