1320220705 has 16 divisors (see below), whose sum is σ = 1627516800. Its totient is φ = 1027488640.

The previous prime is 1320220703. The next prime is 1320220711. The reversal of 1320220705 is 5070220231.

It is not a de Polignac number, because 1320220705 - 2¹ = 1320220703 is a prime.

It is a super-3 number, since 3×1320220705³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320220703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64626 + ... + 82564.

It is an arithmetic number, because the mean of its divisors is an integer number (101719800).

Almost surely, 2^1320220705 is an apocalyptic number.

It is an amenable number.

1320220705 is a deficient number, since it is larger than the sum of its proper divisors (307296095).

1320220705 is a wasteful number, since it uses less digits than its factorization.

1320220705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18344.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 1320220705 is about 36334.8414748159. The cubic root of 1320220705 is about 1097.0224446668.

Adding to 1320220705 its reverse (5070220231), we get a palindrome (6390440936).

The spelling of 1320220705 in words is "one billion, three hundred twenty million, two hundred twenty thousand, seven hundred five".