1220501705 has 4 divisors (see below), whose sum is σ = 1464602052. Its totient is φ = 976401360.

The previous prime is 1220501677. The next prime is 1220501707. The reversal of 1220501705 is 5071050221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 372760249 + 847741456 = 19307^2 + 29116^2 .

It is not a de Polignac number, because 1220501705 - 2⁶ = 1220501641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220501707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122050166 + ... + 122050175.

It is an arithmetic number, because the mean of its divisors is an integer number (366150513).

Almost surely, 2^1220501705 is an apocalyptic number.

It is an amenable number.

1220501705 is a deficient number, since it is larger than the sum of its proper divisors (244100347).

1220501705 is an equidigital number, since it uses as much as digits as its factorization.

1220501705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244100346.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 1220501705 is about 34935.6795411224. The cubic root of 1220501705 is about 1068.6761818536.

Adding to 1220501705 its reverse (5071050221), we get a palindrome (6291551926).

The spelling of 1220501705 in words is "one billion, two hundred twenty million, five hundred one thousand, seven hundred five".