1222005265 has 24 divisors (see below), whose sum is σ = 1599048360. Its totient is φ = 891204864.

The previous prime is 1222005251. The next prime is 1222005283. The reversal of 1222005265 is 5625002221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 206180881 + 1015824384 = 14359^2 + 31872^2 .

It is not a de Polignac number, because 1222005265 - 2⁹ = 1222004753 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 446421 + ... + 449149.

It is an arithmetic number, because the mean of its divisors is an integer number (66627015).

Almost surely, 2^1222005265 is an apocalyptic number.

It is an amenable number.

1222005265 is a deficient number, since it is larger than the sum of its proper divisors (377043095).

1222005265 is an equidigital number, since it uses as much as digits as its factorization.

1222005265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913 (or 2830 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1222005265 is about 34957.1918923703. The cubic root of 1222005265 is about 1069.1148428242.

Adding to 1222005265 its reverse (5625002221), we get a palindrome (6847007486).

The spelling of 1222005265 in words is "one billion, two hundred twenty-two million, five thousand, two hundred sixty-five".