1243123204 has 48 divisors (see below), whose sum is σ = 2244767616. Its totient is φ = 602208000.

The previous prime is 1243123199. The next prime is 1243123207. The reversal of 1243123204 is 4023213421.

It is not an unprimeable number, because it can be changed into a prime (1243123207) 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, 6867994 + ... + 6868174.

It is an arithmetic number, because the mean of its divisors is an integer number (46765992).

Almost surely, 2^1243123204 is an apocalyptic number.

It is an amenable number.

1243123204 is a deficient number, since it is larger than the sum of its proper divisors (1001644412).

1243123204 is a wasteful number, since it uses less digits than its factorization.

1243123204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1243123204 is about 35257.9523512072. The cubic root of 1243123204 is about 1075.2382969831.

Adding to 1243123204 its reverse (4023213421), we get a palindrome (5266336625).

The spelling of 1243123204 in words is "one billion, two hundred forty-three million, one hundred twenty-three thousand, two hundred four".