1204121866 has 32 divisors (see below), whose sum is σ = 1970792208. Its totient is φ = 549519360.

The previous prime is 1204121857. The next prime is 1204121879. The reversal of 1204121866 is 6681214021.

It can be written as a sum of positive squares in 8 ways, for example, as 636300625 + 567821241 = 25225^2 + 23829^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238666 + ... + 243658.

Almost surely, 2^1204121866 is an apocalyptic number.

1204121866 is a deficient number, since it is larger than the sum of its proper divisors (766670342).

1204121866 is a wasteful number, since it uses less digits than its factorization.

1204121866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1204121866 is about 34700.4591612272. The cubic root of 1204121866 is about 1063.8738832607.

Adding to 1204121866 its reverse (6681214021), we get a palindrome (7885335887).

The spelling of 1204121866 in words is "one billion, two hundred four million, one hundred twenty-one thousand, eight hundred sixty-six".