1222740961 has 16 divisors (see below), whose sum is σ = 1354329424. Its totient is φ = 1096602624.

The previous prime is 1222740943. The next prime is 1222740971. The reversal of 1222740961 is 1690472221.

It can be written as a sum of positive squares in 8 ways, for example, as 9960336 + 1212780625 = 3156^2 + 34825^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1222740961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222740901) 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, 449341 + ... + 452053.

It is an arithmetic number, because the mean of its divisors is an integer number (84645589).

Almost surely, 2^1222740961 is an apocalyptic number.

It is an amenable number.

1222740961 is a deficient number, since it is larger than the sum of its proper divisors (131588463).

1222740961 is a wasteful number, since it uses less digits than its factorization.

1222740961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1222740961 is about 34967.7131222504. The cubic root of 1222740961 is about 1069.3293497348.

The spelling of 1222740961 in words is "one billion, two hundred twenty-two million, seven hundred forty thousand, nine hundred sixty-one".