1222765256 has 32 divisors (see below), whose sum is σ = 2439110880. Its totient is φ = 572678400.

The previous prime is 1222765253. The next prime is 1222765277. The reversal of 1222765256 is 6525672221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1222765253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7391 + ... + 50001.

It is an arithmetic number, because the mean of its divisors is an integer number (76222215).

Almost surely, 2^1222765256 is an apocalyptic number.

It is an amenable number.

1222765256 is a deficient number, since it is larger than the sum of its proper divisors (1216345624).

1222765256 is a wasteful number, since it uses less digits than its factorization.

1222765256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42845 (or 42841 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 1222765256 is about 34968.0605124162. The cubic root of 1222765256 is about 1069.3364319611.

The spelling of 1222765256 in words is "one billion, two hundred twenty-two million, seven hundred sixty-five thousand, two hundred fifty-six".