1243121304 has 32 divisors (see below), whose sum is σ = 3128670000. Its totient is φ = 411591552.

The previous prime is 1243121287. The next prime is 1243121309. The reversal of 1243121304 is 4031213421.

It is a super-3 number, since 3×1243121304³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243121309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170239 + ... + 177390.

Almost surely, 2^1243121304 is an apocalyptic number.

It is an amenable number.

1243121304 is an abundant number, since it is smaller than the sum of its proper divisors (1885548696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243121304 is a wasteful number, since it uses less digits than its factorization.

1243121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347787 (or 347783 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1243121304 is about 35257.9254069209. The cubic root of 1243121304 is about 1075.2377491818.

Adding to 1243121304 its reverse (4031213421), we get a palindrome (5274334725).

The spelling of 1243121304 in words is "one billion, two hundred forty-three million, one hundred twenty-one thousand, three hundred four".