1220126065 has 4 divisors (see below), whose sum is σ = 1464151284. Its totient is φ = 976100848.

The previous prime is 1220126041. The next prime is 1220126069. The reversal of 1220126065 is 5606210221.

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 920697649 + 299428416 = 30343^2 + 17304^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220126065 - 2⁹ = 1220125553 is a prime.

It is a super-2 number, since 2×1220126065² = 2977415228984768450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220126069) 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, 122012602 + ... + 122012611.

It is an arithmetic number, because the mean of its divisors is an integer number (366037821).

Almost surely, 2^1220126065 is an apocalyptic number.

It is an amenable number.

1220126065 is a deficient number, since it is larger than the sum of its proper divisors (244025219).

1220126065 is an equidigital number, since it uses as much as digits as its factorization.

1220126065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244025218.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1220126065 is about 34930.3029617551. The cubic root of 1220126065 is about 1068.5665333076.

Adding to 1220126065 its reverse (5606210221), we get a palindrome (6826336286).

The spelling of 1220126065 in words is "one billion, two hundred twenty million, one hundred twenty-six thousand, sixty-five".