1220041705 has 4 divisors (see below), whose sum is σ = 1464050052. Its totient is φ = 976033360.

The previous prime is 1220041681. The next prime is 1220041717. The reversal of 1220041705 is 5071400221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5071400221 = 4817 ⋅1052813.

It can be written as a sum of positive squares in 2 ways, for example, as 319801689 + 900240016 = 17883^2 + 30004^2 .

It is not a de Polignac number, because 1220041705 - 2¹³ = 1220033513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122004166 + ... + 122004175.

It is an arithmetic number, because the mean of its divisors is an integer number (366012513).

Almost surely, 2^1220041705 is an apocalyptic number.

It is an amenable number.

1220041705 is a deficient number, since it is larger than the sum of its proper divisors (244008347).

1220041705 is an equidigital number, since it uses as much as digits as its factorization.

1220041705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244008346.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1220041705 is about 34929.0953933823. The cubic root of 1220041705 is about 1068.5419057021.

Adding to 1220041705 its reverse (5071400221), we get a palindrome (6291441926).

The spelling of 1220041705 in words is "one billion, two hundred twenty million, forty-one thousand, seven hundred five".