1222264561 has 16 divisors (see below), whose sum is σ = 1410755584. Its totient is φ = 1037297664.

The previous prime is 1222264523. The next prime is 1222264577. The reversal of 1222264561 is 1654622221.

It is a cyclic number.

It is not a de Polignac number, because 1222264561 - 2¹³ = 1222256369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222264261) 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, 299245 + ... + 303301.

It is an arithmetic number, because the mean of its divisors is an integer number (88172224).

Almost surely, 2^1222264561 is an apocalyptic number.

It is an amenable number.

1222264561 is a deficient number, since it is larger than the sum of its proper divisors (188491023).

1222264561 is a wasteful number, since it uses less digits than its factorization.

1222264561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480.

The product of its digits is 11520, while the sum is 31.

The square root of 1222264561 is about 34960.9004603714. The cubic root of 1222264561 is about 1069.1904555909.

Adding to 1222264561 its reverse (1654622221), we get a palindrome (2876886782).

The spelling of 1222264561 in words is "one billion, two hundred twenty-two million, two hundred sixty-four thousand, five hundred sixty-one".